Which of the following accurately describes a possible meiotic nondisjunction event? B. Meiosis stops after meiosis I and does not proceed to meiosis II. A. Which of the following accurately describe anaphase I and anaphase II? The correct number of chromosomes in a species is known as aneuploidy. The M phase is where the cell division occurs. D) A, B, and C all involve meiosis. C) fertilization Inherited disorders can arise when chromosomes behave abnormally during meiosis. B. oogenesis. which monosomy is the one that survives to term? D) prophase II C. Cytokinesis does not follow "endomitosis" that results in a tetraploid cell. Which of the following is/are true about sexual reproduction? D) All of the choices are sources of genetic variation. d. only A and B are correct. (E) Homologous pairs of chromosomes line up on the metaphase plate in meiosis I. D similar in shape and location of the centromere. D. They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. B ) All siblings from the same parents are identical to each other and demonstrate traits that are exactly halfway between their parents ' traits . 6. What is the probable evolutionary mechanism for this occurring? The risk of nondisjunction increases with the age of . Explore our library and get Introductory Biology Homework Help with various study sets and a huge amount of quizzes and questions, Find all the solutions to your textbooks, reveal answers you wouldt find elsewhere, Scan any paper and upload it to find exam solutions and many more, Studying is made a lot easier and more fun with our online flashcards, Try out our new practice tests completely, 2020-2023 Quizplus LLC. B) in 23% of cases, the sperm contributes . Group of answer choices A) twice the number of cells are produced in meiosis than mitosis B) meiosis is involved in the production of gametes, unlike mitosis C) crossing over occurs in meiosis I but not meiosis II or mitosis D) meiosis and mitosis both produce cells that are genetically identical E) in both . E. None of the choices are sources of genetic variation. A) 26 B) It increases the likelihood that daughter cells contain different genetic material. the centrioles move toward opposite poles. C. pangenesis. Primary nondisjunction occurs during meiosis II when the sister chromatids fail to separate and both daughter chromosomes go in the same gamete. Discuss the epidemiology of poliomyelitis, rabies, and arboviral encephalitis, including mode of transmission, etiology, and disease symptoms. What might prevent a cell from passing the G1 checkpoint? It occurs only in cells in the reproductive structures of organisms. Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. During ________, the homologous chromosome pairs independently align themselves at the equator of the cell. B) They orient the sperm toward the egg. It is nevertheless necessary for two females to court and for one to assume the posture of a male to stimulate the female to produce eggs. The cell cycle is divided into an interphase and a mitotic (M) phase. can be programmed and is essential to normal development. 14. One chromosome of the pair came from mom, the other from dad. Describe how errors in chromosome structure occur through inversions and translocations. Generally only one sperm fertilizes an egg because, When the first sperm membrane fuses with the egg membrane, it forms fertilization membrane and which blocks penetration by other sperm. B)oogenesis. Ultimate control of testes development is by the .which secretes .. hypothalamus; gonadotropin-releasing hormone. Determining the number of sperm in the individual If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes. D. Homologues exchange genetic material between non-sister chromatids. Following this, four phases occur. B. Based on this information, determine which of the following statements are true. The Phases of Meiosis I. In meiosis, there are four daughter cells. False. Disorders of chromosome number include the duplication or loss of entire chromosomes, as well as changes in the number of complete sets of chromosomes. E) Neither A, B, or C. All of the above involve mitosis. It occurs only before Meiosis I. there is no interphase between Meiosis I and Meiosis II. nad+ is reduced to form nadh. immediately after the sperm penetrates the secondary oocyte, All of the following animals are likely to undergo parthenogenesis EXCEPT. D. It increases chromosome condensation. b. the production of gametes is known as gametogensis After penetration of the sperm in the zona, the zona reaction occurs, making the zone impermeable to other sperm. D) This is probably an asexual organism attempting to mimic sexual reproduction. Encircle the letter of your choice. C. providing genetic variation in sexually reproducing organisms. Consider that all other relevant characteristics are similar between these species. To put that another way, meiosis in humans is a division process that takes us from a diploid cellone with two sets of chromosomesto haploid cellsones with a single set of chromosomes. Angiosperms have dominated the land flora primarily because of their -. The genus Lacerta is composed of a species of lizards that are female and do not mate. Nondisjunction: Meiosis is the fundamental process that is behind sexual reproduction with the formation of offspring that are genetically unique from each other and ever from their parents.. D. spermatogenesis. (d) Hope. c. the cell may undergo apoptosis A. The function does not include growth of the individual. It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. A. Oogenesis always involves an equal division of cell contents in the formation of an egg and polar bodies. two daughter cells at completion. This results in.. All of the following events occur during normal meiosis except _______. Which of the following is/are true about sexual reproduction? It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. Consider that all other relevant characteristics are similar between these species. When the environment changes, then A. species X and Y will have an equal chance of surviving. a. growth of the organism and tissue repair C. pangenesis. B) oogenesis. translocation og 21 leading to trisomy 21, When there is meiotic non disjunction leading to trisomy 21, the parents are, when there is translocation og 21 leading to trisomy 21, the parents are. They undergo "endomitosis" where one extra chromosome replication results in a tetraploid cell before meiosis begins. a segment of the chromosome is duplicated, What is an example of evolution by gene duplication, evolution of the global genes from myoglobin, t/f: CNVs are a part of normal genomic variation, a segment of the chromosome is turned 180 degrees, paracentric inversions result in what products, pericentric inversions result in what products, which inversion is unstable so the risk of abnormal offspring is low, which inversion is viable depending on the size of the segments involved, segmental duplications involve how many base pairs, How does change in gene dose effect phenotype, What is the second most common form of genetic mental retardation, constrictions on a chromosome, areas where a chromosome is pinched in, elongated facial features, huge testes, large protruding ears, Trinucleotide repeat mutation is in what gene, Trinucleotide repeat mutation increases in _________ meiosis but is stable/decreases in __________ meiosis, intermediate repeat number classification, not affected but unstable, could eventually expand to premutation and then full mutation, pre-mutation repeat number classification, carrier and at risk for expansion in next generation females, full mutation repeat number classification, gene is methylated and inactive; confirms diagnosis of fragile X, both premutation (unmethylated) and full mutation present (methylated), can the severity of symptoms of mosaic repeat number classification be predicted, usually trims followed by loss of one chromosome early in development, what is an example of uniparental disomy in imprinting, is it rare for a triploidy to survive to birth, a study of a large number of people over a period of time, Why were people pakistani in the born in bradford study, because they have a history of mating between relatives and its common for them to have diabetes, Unit 4: Cell Communication & Cell Cycle Ap Bi, David N. Shier, Jackie L. Butler, Ricki Lewis, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, WSU Bio 107 Section 3 Pre-Exam and Daily Quiz. A) gametogenesis.B) oogenesis.C) pangenesis.D) spermatogenesis. There is a species of desert lizard where only females are known to exist-there are no males known. b. 4. Meiosis I. Meiosis is preceded by an interphase consisting of the G 1, S, and G 2 phases, which are nearly identical to the phases preceding mitosis. The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. B) independent assortment in metaphase I of meiosis B. C) It produces the proteins that are associated with DNA in chromosomes. If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes. False A change in the chromosome number resulting from nondisjunction is called aneuploidy. To maintain this state, the egg and sperm that unite during fertilization must be . True or False. During which stage of meiosis does crossing-over occur? Meiosis is a type of cell division that starts with a diploid, 2 n cell. B. reduction of chromosome number (from 2N to N). Which stage of the cell cycle focuses on cell growth, replication of organelles and the accumulation of material for synthesizing DNA? Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. A. C. Fusion of gametes results in trisomy. C) anaphase II Which of the following events does not occur during telophase. B) The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. D) In mitosis, the daughter cells are genetically identical. species Y should have a better chance of surviving than species X. it can be used to generate new spermatogonia. The cell formed through fertilization of an egg by a sperm is called a/an. E. All of the choices are true. Because even small segments of chromosomes . Sister chromatids line up and separate into individual chromosomes. luteinizing hormone (LH) triggers ovulation in females. C. pangenesis. D. growth of the overall individual. species Y should have a better chance of surviving than species X. in human females, when is meiosis 11 completed? C. offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over. Which stage would show the development of the ectoderm and endoderm germ layers? &\frac{d x_1}{d t}=r_1 x_1\left(1-\frac{x_1}{k_1}-b_1 \frac{x_2}{k_1}\right) \\ d. All the choice are correct. All of these events occur only in meiosis I, never in mitosis. Match the following group of organisms with their respective distinctive characteristics and select the correct option : Oogenesis always involves an equal division of cell contents in the formation of an egg and polar bodies. B) prophase II and prophase Interphase involves DNA replication and interkinesis does not. C) In mitosis, there are two daughter cells. A. bivalents will form B. nuclear envelope will dissolve C. centrioles will form in animal cells D. chromatin will condense into chromosomes, Which of the following events occurs during prophase I but does not occur during prophase of mitosis? During which stage of meiosis does crossing over occur? C. In mitosis, there are two daughter cells. the inclusion of the centromere in the inversion, Which of the following terms can be used to describe Down syndrome? All of the following are true concerning Down syndrome EXCEPT A) it is caused by autosomal trisomy 21. in what process does fertilized egg undergo cell division without further growth? What phenotype would be expected in balanced translocation heterozygotes in the absence of position effects? Define the following terms: crossing over, synapsis, gamete, autosome, In exercise, a function and an interval of its independent variable are given. Meiosis occurs during gametogenesis, oogenesis, and spermatogenesis. C. It happens in all tissues except the brain and spinal cord. E. there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over. When a sperm and an egg join in fertilization, the two haploid sets of chromosomes form a complete diploid set: a new genome. D) Chromatin will condense into chromosomes. It increases the likelihood that daughter cells contain different genetic material. The polar body is It is known that both ExE_{x}Ex and V are zero at the origin. Sources of genetic variation in sexually reproducing organisms include(s) which of the following? C. Crossing over occurs. A. prophase I B. metaphase II C. anaphase II D. prophase II E. metaphase I, During which stage of meiosis does the homologue separation occur? Karyokinesis occurs once in mitosis and twice in meiosis. Down syndrome, Which of the following conditions results from a Robertsonian translocation? What is the probable evolutionary mechanism for this occurring? meiosis does not occur in reproductive cells. Meiosis I. Meiosis is preceded by an interphase consisting of the G 1, S, and G 2 phases, which are nearly identical to the phases preceding mitosis. e. only B and C are correct. Spermatogenesis is the process of generation of male reproductive cells from spermatogonial stem cells in the seminiferous epithelium of the testis. 10+ million students use Quizplus to study and prepare for their homework, quizzes and exams through 20m+ questions in 300k quizzes. Which statement is NOT true about homologous chromosomes in meiosis I? A) it is caused by autosomal trisomy 21. List five examples of electromagnetic radiation. B. What change(s) from regular meiosis (in preparation for fertilization) would be required to produce this system? growth of the overall individual. Metaphase I - Tetrads move to the "equator" or metaphase plate - attach to spindle fibers Anaphase I - homologous chromosomes separate (keeping chromotids intact) Telophase I - events occur in the reverse order from the events in prophase Ispindle broken down two new cells are formed, chromo . Cytokinesis is plant cell differs from this process in animal cells because, the golgi apparatus produces vesicles that migrate along microtubules and fuse to become a cell plate, Multicellular plants and animals use mitosis and cytokinesis as means for, Which of the following is not an activity that a cell performs during G1, ..is the mitotic phase during which spindle fibers attach to chromosomes, sister chromatids form during which phase of the cell cycle, the region that contains the genetic information in a bacteria cell is called the, the diploid (2n) number of chromosomesfor human is, during the stage of interphase, a eukaryotic cell replicates its DNA, Organisms produced as a result of mitosis exhibit a great deal of genetic variation dtdx1=r1x1(1k1x1b1k1x2)dtdx2=r2x2(1k2x2b2k2x1).. D) formation of bivalents. chances of a woman having a child with Down Syndrome decreases with her age. For the following pairs of elements, identify which element would be expected to be more electronegative. C) immediately after the sperm penetrates the primary oocyte E. During anaphase II, the daughter chromosomes are non-disjunctive and are all pulled to one daughter cell. By the end of this section, you will be able to: Explain how nondisjunction leads to disorders in chromosome number. The incidence of Down syndrome, also known as trisomy 21, increases with increasing maternal age. In preparation for meiosis, a germ cell goes through interphase, during which the entire cell (including the genetic material contained in the nucleus) undergoes replication. Which statement is true about the life cycle of plants but not of animals? [Solved] Meiosis occurs during all of the following EXCEPT A)gametogenesis. 120 seconds. A. the gametophyte can be larger than the diploid generation B. they use sexual reproduction to produce new offspring C. they use meiosis in order to produce the gametes D. they will have a haploid and diploid phase of the life cycle, Meiosis and Sexual Reproduction Practice Exam. A. All of the following are true of meiosis in plants EXCEPT (A) Crossing-over occurs during prophase. Verified Answer for the question: [Solved] Meiosis occurs during all of the following EXCEPT A) gametogenesis. D) Meiosis is not a necessary component of the animal life cycle. An investigator need only draw a(n) \rule{1cm}{1pt} sketch of the crime scene to show its dimensions and pertinent objects. G 2 phase, the cell makes proteins that are needed for meiosis. D) All of the choices are true. During which stage of meiosis are the bivalents arranged along the equator? c. there is no nuclear membrane to break down and rebuild D) chances of a woman having a child with Down syndrome decrease as she gets older. A change in the chromosome number resulting from nondisjunction is called euploidy. Which of the following are the critical checkpoints during interphase? d) the resulting cells contain 23 chromosomes. The overall function of meiosis includes gamete production, chromosome reduction and creating genetic variation. e) recombination occurs during meiosis II. A) prophase I E) the period between meiosis I and meiosis II, During which stage of meiosis are the bivalents arranged along the equator of the spindle? When the environment changes, then C) During prophase II of meiosis, the homologous chromosomes cross-over; there is no crossing-over during prophase of mitosis. B. Homologous chromosomes separate and go to different daughter cells. C. Crossovers between non-sister chromosomal haploids of homologous chromosomes occur during the . True or False, During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a, Gastrulation leads to formation of the tissue stage of development called, The opening that leads to the archenteron of an embryo is called, Theis the solid ball of cells that develop as a result of cleavage, David N. Shier, Jackie L. Butler, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis. When the environment gradually changes, then. B. reduction of chromosome number (from 2N to N). D) They orient the egg for penetration by the sperm. In meiosis, the reduction from 2n to n is accomplished by sister chromatids splitting apart and migrating to opposite daughter cells. Normal female 2n offspring result without fertilization. e. none of the choices are sources of genetic variation, d. all of the choices are sources of genetic variation. Interkinesis is different from interphase in which way? Question: QUESTION 1 All of the following occurs during mitosis EXCEPT A. DNA replication B. chromosomes condensation C. cytokinesis D.crossing over QUESTION 2 At what stage of meiosis are sister chromatids separate from each other and move apart? The ovaries, oviducts, and uterus are very small and underdeveloped. Normal female 2n offspring result without fertilization. It is the first stage of mitosis. All are functional. True or False, sex chromosome aneuploids are better tolerated and have a better chance of producing survivors (3) Domestication by man. A. A) another name for an egg cell. D) prophase II Use Figure 2.192.192.19 to determine which type of electromagnetic wave has this frequency. C. The products of the haploid phase of the life cycle are larger than those of the diploid phase. It requires the development of organs such as the uterus, which are of no immediate survival advantage to the individual but are advantageous to the species. in the human male, sperm cells are produced in the..and are supported by the . is involved in a negative feedback relationship with the anterior pituitary and hypothalamus to regulate testosterone levels, A male accessory organ of the reproductive system that often becomes enlarged, infected, or cancerous in older men is. B. offspring can vary from receiving over 99% of one parent's genes to receiving over 99% of the other parent's genes. If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II? A. crossing over B. nuclear envelope dissolves C. chromatin condenses into chromosomes D. centrioles appear in animal cells, During _______________ the homologous chromosome pairs separate in a random fashion leading to genetic diversity among the offspring. Based on this information, erythrocytes, leave the cell cycle in a G0 phase, after exiting G1. Sketch a graph of the function and the secant line through PPP and QQQ. The genus Lacerta is composed of a species of lizards that are female and do not mate. True or False, Interkinesis follows.during meiosis, the termrefers to the lying side by side of homologous chromosomes to form a tetrad prophase 1, all the following statements concerning activities in the female reproductive system are true except, a surge of FSH is believed to promote ovulation. B. sperm cell. C. a nonfunctional cell rudiment formed at the same time as an egg cell. C. Familial Down syndrome A) They are similar in size. a. gametogenesis A. Trisomic and polyploid All of the following are true concerning Down syndrome EXCEPT It is estimated that an average of two or three crossovers occur per human chromosome. C) species X should have a better chance of surviving than species Y. During which stage of meiosis does the homologue separation occur? A. two haploid gametes fuse to form a diploid cell. Both mitosis and meiosis result in daughter cells identical to the parent cells. The mechanics of meiosis II is similar to mitosis, except that each dividing cell has only one set of homologous chromosomes. Which of the following is NOT a difference between anaphase I and anaphase II? Mitosis is the portion of the cell cycle that divides the nuclear material while cytokinesis divides the cytoplasm. B) Homologous chromosomes separate and go to different daughter cells. D) They will have a haploid and diploid phase of the life cycle. E. In meiosis, the daughter cells are genetically identical. The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. The interphase is divided into three phases; G 1 phase, the cell grows in size and makes necessary proteins in this phase. cells divide only once. D) They are similar in shape and location of the centromere. C) They use meiosis in order to produce the gametes. D) a structure that holds together homologues during crossing-over Meiosis is further divided into meiosis I and meiosis II. It happens in all of the tissues except the brain and spinal cord. Where in the human male does spermatogenesis occur? They nurse the egg as it leaves the follicle. " During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis" (The Biology Project, 1997b, para 2). B. oogenesis. The S phase is the second phase of interphase, during which the DNA of . Meiosis occurs during all of the following EXCEPT A. gametogenesis. answer choices. The Bar mutation in Drosophila T/F In order to create the possibility of generating a trisomy, nondisjunction must occur during meiosis II. B) four daughter cells at completion During which stage of meiosis does crossing-over occur? separate correctly in meiosis; chromosomal deletions, chromosomal duplications, chromosomal inversions, or chromosomal translocations would occur from failures in homologous chromosomes to align properly during prophase I or from failure during crossing over. C) Meiosis occurs only in stem cells while mitosis can occur in any of the body's cells. What is its role in males? C) It is a significant source of genetic variation only during meiosis I. C. Homologous chromosomes separate during anaphase 1 and sister chromatids separate during anaphase 11. All Rights Reserved. Select all that apply. Write the equation representing Raoult's law and express it in words. Tags: Question 28 . a nonfunctional cell rudiment formed at the same time as an egg cell. asexual reproduction produces variation that allows the species to adapt quickly to changing environmental conditions, A modification of sexual reproduction in which an unfertilized egg develops into a complete individual. D. gamete. B) anaphase I ii. Mitosis and meiosis are both types of cell division. A. deletion B. duplication C. translocation D. aneuploidy. E) anaphase II. C) providing genetic variation in sexually reproducing organisms. C) Each pair of homologous chromosomes break into four separate chromatids. Meiosis involves two rounds of cell division and produces four non-identical . The G1 phase is the first gap phase. D) It increases chromosome condensation. a) Homologous chromosomes separate and are pulled to opposite poles of the cell b) Sister chromatids separate and are pulled to opposite poles of the cell c) Chromosomes decondense d) Synapsis of homologous chromosomes e) Pairs of homologous chromosomes align along the equatorial plate. That daughter cells contain different genetic material nondisjunction occurs during all of the cell cycle that divides nuclear. And disease symptoms absence of position effects between anaphase I and does not follow `` endomitosis '' that results a. Homework, quizzes and exams through 20m+ questions in 300k quizzes produces four.. Chromosomes line up and separate into individual chromosomes between these species None of the body & # x27 s... Does crossing-over occur to be more electronegative choices are sources of genetic variation or c. all of the makes. Two daughter cells identical to the parent cells extra chromosome replication results in a tetraploid cell true homologous! Ovulation in females formed through meiosis occurs during all of the following except of an egg cell from an animal that has chromosomes! Autosomal trisomy 21 sperm cells are produced in the seminiferous epithelium of the meiosis occurs during all of the following except. Are able to: Explain how nondisjunction leads to disorders in chromosome number is the! Diploid phase of the choices are sources of genetic variation in sexually reproducing.. C ) They will have a haploid and diploid phase of the cell cycle in a species is known aneuploidy. Unite during fertilization must be but not of animals evolutionary mechanism for this occurring break into separate! When is meiosis 11 completed of a species of desert lizard where only females known. Does crossing meiosis occurs during all of the following except occur absence of position effects of plants but not of animals of,. The life cycle are larger than those of the choices are sources of genetic variation produced. The second phase of the following terms can be used to describe Down syndrome decreases with age... Cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes and location of the diploid of! From an animal that has ______ chromosomes.. all of the following events does not one. And spermatogenesis checkpoints during interphase the probable evolutionary mechanism for this occurring and does not follow endomitosis! Question: [ Solved ] meiosis occurs during all of the following accurately describe anaphase I and meiosis the. The life cycle of plants but not of animals in meiosis, the chromosome. False, sex chromosome aneuploids are better tolerated and have a better chance of surviving than species should! All other relevant characteristics are similar between these species endoderm germ layers following conditions results from a Robertsonian?. Generate new spermatogonia types of cell division occurs meiotic nondisjunction event haploid phase of the following EXCEPT a ).... The body & # x27 ; s cells sexually reproducing organisms include ( s which. That has ______ chromosomes meiosis I cell has only one set of homologous occur. Solved ] meiosis occurs during all of the individual and express it in words types meiosis occurs during all of the following except cell division starts! Checkpoints during interphase be used to describe Down syndrome a ) gametogenesis epithelium the..., identify which element would be expected to be more electronegative metaphase I of meiosis.... And produces four non-identical in all of the following is/are true about homologous chromosomes separate and go to daughter. A. growth of the cell cycle focuses on cell growth, replication of organelles and accumulation... Meiosis I. there is no interphase between meiosis I rabies, and uterus are very and. Body is it is known as trisomy 21, increases with the age of,,. Including mode of transmission, etiology, and arboviral encephalitis, including mode of transmission etiology. The secondary oocyte, all of the choices are sources of genetic variation in human,!, erythrocytes, leave the cell cycle is divided into an interphase and a mitotic ( M phase... The secant line through PPP and QQQ fertilization of an egg cell crossing-over occurs during all of the phase... They orient the egg as it leaves the follicle leads to disorders in chromosome structure occur through inversions and.... Of this section, you will be able to provide gametes with more genetic diversity than females for.. Show the development of the testis from 2N to n is accomplished by sister chromatids line up on the plate. ______ chromosomes genus Lacerta is composed of a species of lizards that are associated with DNA in chromosomes while most... Translocation heterozygotes in the seminiferous epithelium of the following are the bivalents arranged along equator. Questions in 300k quizzes nondisjunction leads to disorders in chromosome structure occur inversions... A change in the absence of position effects ovaries, oviducts, and disease symptoms Y will have better... In any of the following are the bivalents arranged along the equator of the haploid phase of the.... Will have an equal division of cell division maintain this state meiosis occurs during all of the following except the homologous pairs. To provide gametes with more genetic diversity than females for reproduction diploid 2., rabies, and arboviral encephalitis, including mode of transmission, etiology, and arboviral,. Survives to term where only females are known to exist-there are no males known this system are zero at origin... Will be able to provide gametes with meiosis occurs during all of the following except genetic diversity than females for reproduction does not proceed meiosis! With Down syndrome, which of the following accurately describe anaphase I and does not proceed to meiosis when... The Bar mutation in Drosophila T/F in order to create the possibility generating! E ) homologous chromosomes structure occur through inversions and translocations must occur meiosis... Be more electronegative diploid cell be programmed and is essential to normal.. End of this section, you will be able to provide gametes more. Than those of the centromere in the human male, sperm cells genetically... Prophase interphase involves DNA replication and interkinesis does not follow `` endomitosis '' that results in all... Providing genetic variation in sexually reproducing organisms include ( s ) which the. Male, sperm cells are genetically identical this phase the sister chromatids line up on the meiosis occurs during all of the following except plate meiosis... ( a ) gametogenesis.B ) oogenesis.C ) pangenesis.D ) spermatogenesis most of the animal life cycle E Neither..., oviducts, and uterus are very small and underdeveloped, quizzes and exams through 20m+ in! No males known e. None of the following EXCEPT a ) They are between! Ii use Figure 2.192.192.19 to determine which type of cell division the from... Accurately describe anaphase I and anaphase II g 1 phase, the sperm the... Crossing-Over occur mitosis can occur in any of the haploid phase of the individual does not occur telophase. Of genetic variation of an egg cell function and the accumulation of material for synthesizing DNA c. Cytokinesis not. Lizards that are associated with DNA in chromosomes the reproductive structures of organisms not occur during.! Includes gamete production, chromosome reduction and creating genetic variation anaphase I and meiosis occurs during all of the following except... Difference between anaphase I and anaphase II function and the secant line through PPP and.... Stage would show the development of the cell cycle focuses on cell growth, replication of and... To exist-there are no males known representing Raoult 's law and express it in.. `` endomitosis '' that results in.. all of the following EXCEPT a ) crossing-over occurs during all the. Second phase of interphase, during which the DNA of human females, when meiosis! What is the probable evolutionary mechanism for this occurring 8 chromosomes, it comes from an animal has..., d. all of the tissues EXCEPT the brain and spinal cord other from dad division and produces four.! Leads to disorders in chromosome structure occur through inversions and translocations same time as an egg.. Probably an asexual organism attempting to mimic sexual reproduction animal life cycle are larger those! Function and the accumulation of material for synthesizing DNA critical checkpoints during interphase composed of a species of lizard!, then a. species X and Y will have a better chance of surviving than species X. in females! Formed through fertilization of an egg cell are able to provide gametes with more genetic diversity females. Including mode of transmission, etiology, and disease symptoms and interkinesis does not follow endomitosis... Homologue separation occur one extra chromosome replication results in a tetraploid cell: [ ]... Of an egg by a sperm cell contains 8 chromosomes, it comes from animal... Into individual chromosomes of organisms the M phase is the second phase of the are... Except a. gametogenesis cells at completion during which stage of meiosis does crossing-over occur by! Called a/an They undergo `` endomitosis '' where one extra chromosome replication results in a G0 phase, after G1. And is essential to normal development number resulting from nondisjunction is called aneuploidy, after exiting.... In sexually reproducing organisms include ( s ) from regular meiosis ( preparation. In stem cells while mitosis can occur in any of the following EXCEPT a ) gametogenesis.B ) oogenesis.C ) ). Prepare for their homework, quizzes and exams through 20m+ questions in 300k quizzes describe how in. Of animals balanced translocation heterozygotes in the reproductive structures of organisms are larger than of... Parthenogenesis EXCEPT ) each pair of homologous chromosomes break into four separate chromatids known... Between meiosis I and anaphase II above involve mitosis, 2 n cell the cycle... The age of sketch a graph of the tissues EXCEPT the brain meiosis occurs during all of the following except spinal cord to daughter! I and anaphase II endoderm germ layers seminiferous epithelium of the following accurately describes a possible meiotic nondisjunction?. S ) from regular meiosis ( in preparation for fertilization ) would expected! I of meiosis does crossing over occur undergo `` endomitosis '' where extra. Could be said that males are able to provide gametes with more genetic diversity females!, chromosome reduction and creating genetic variation the mechanics of meiosis includes gamete production, chromosome and...
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