Meiotic nondisjunction generates aneuploid products Nondisjunction at first division Second division n+1 n+1 n-1 n-1 First division Nondisjunction at second division n+1 n-1 FIGURE 17-12 Aneuploid products of meiosis (that is, gametes) are produced by nondisjunction at the first or second meiotic division. Note that all other chromosomes are present in normal number, including in the cells in Nondisjunction c example of a chance processes that fail are nondisjunction can E tion, thereby inhibiti. be more likely to go a mal anaphase I disjur remain paired during contrast, proper disju which no chromosomes are shown. O LounchPad ANIMATED ART: Meiotic nondisjunction

Meiotic nondisjunction generates aneuploid products Nondisjunction at first division Second division n+1 n+1 n-1 n-1 First division Nondisjunction at second division n+1 n-1 FIGURE 17-12 Aneuploid products of meiosis (that is, gametes) are produced by nondisjunction at the first or second meiotic division. Note that all other chromosomes are present in normal number, including in the cells in Nondisjunction c example of a chance processes that fail are nondisjunction can E tion, thereby inhibiti. be more likely to go a mal anaphase I disjur remain paired during contrast, proper disju which no chromosomes are shown. O LounchPad ANIMATED ART: Meiotic nondisjunction

Name: In Figure 17-12, what would be the constitution of an individual forme
Uploaded: 2024-03-20T06:42:55.000Z
Channel: Bartleby
Description: In Figure 17-12, what would be the constitution of an individual formed from the union of a monosomic from afirst-division nondisjunction in a female and a disomicfrom a second-division nondisjunction in a male, assuming the gametes were functional?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter2: Cells And Cell Division

Section: Chapter Questions

Problem 27QP: Compare meiotic anaphase I with meiotic anaphase II. Which meiotic anaphase is most similar to the...

See similar textbooks

Similar questions

1. 10 Meiosis Reading and Voc X James Green- Recovery Opportu X d/e/1FAlpQLSe2TqFrpPuk-re3-isqbyWK6SUIH3pkHhJdbT0tlqogh58bww/viewform?hr_submission=Chkis-WD4ZSE What is the process by which haploid gametes combine, forming a diploid 3p cell with 2n chromosomes, with n chromosomes from the female parent and n chromosomes from the male parent? Topography O Fertilization Genomics Crossing over 2 points nit that controls inherited trait expression that is passed II
Somatic cells in organisms of a particular diploidplant species normally have 14 chromosomes. Thechromosomes in the gametes are numbered from 1through 7. Rarely, zygotes are formed that containmore or fewer than 14 chromosomes. For each of thezygotes below, (i) state whether the chromosomecomplement is euploid or aneuploid; (ii) provideterms that describe the individual’s genetic makeupas accurately as possible; and (iii) state whether ornot the individual will likely develop through theembryonic stages to make an adult plant, and if so,whether or not this plant will be fertile.a. 11 22 33 44 5 66 77b. 111 22 33 44 555 66 77c. 111 222 333 444 555 666 777d. 1111 2222 3333 4444 5555 6666 7777
A woman who sought genetic counseling is found to be heterozygousfor a chromosomal rearrangement between the second andthird chromosomes. Her chromosomes, compared to those in anormal karyotype, are diagrammed on the next page:(a) What kind of chromosomal aberration is shown? (b) Using a drawing, demonstrate how these chromosomeswould pair during meiosis. Be sure to label the differentsegments of the chromosomes.(c) This woman is phenotypically normal. Does thissurprise you? Why or why not? Under what circumstancesmight you expect a phenotypic effect of such arearrangement? The woman in above problem has had two miscarriages. Shehas come to you, an established genetic counselor, with thesequestions:(a) If not, what is the chance that she could have a normalchild? Provide an informed response to her concerns
A woman who sought genetic counseling is found to be heterozygousfor a chromosomal rearrangement between the second andthird chromosomes. Her chromosomes, compared to those in anormal karyotype, are diagrammed on the next page:(a) What kind of chromosomal aberration is shown? (b) Using a drawing, demonstrate how these chromosomeswould pair during meiosis. Be sure to label the differentsegments of the chromosomes.(c) This woman is phenotypically normal. Does thissurprise you? Why or why not? Under what circumstancesmight you expect a phenotypic effect of such arearrangement? The woman in above problem has had two miscarriages. Shehas come to you, an established genetic counselor, with thesequestions:(a) Is there a genetic explanation of her frequent miscarriages?
Suppose that meiosis occurs in the transient diploid stageof the cycle of a haploid organism of chromosome number n. What is the probability that an individual haploidcell resulting from the meiotic division will have a complete parental set of centromeres (that is, a set all fromone parent or all from the other parent)?
In Neurospora, his2 mutants require the amino acidhistidine for growth, and lys4 mutants require theamino acid lysine. The two genes are on the samearm of the same chromosome, in the ordercentromere - his2 - lys4.A his2 mutant is mated with a lys4 mutant. Draw all ofthe possible ordered asci that could result from meioses in which the following events occurred, accountingfor the nutritional requirements for each ascospore.Ascospores without any copy of a chromosome willabort and die, turning white in the process.a. A single crossover between the centromere and his2b. A single crossover between his2 and lys4c. Nondisjunction during the first meiotic divisiond. Nondisjunction during the second meiotic divisione. A single crossover between the centromere andhis2, followed by nondisjunction during the firstmeiotic divisionf. A single crossover between his2 and lys4,followed by nondisjunction during the firstmeiotic division
A diploid species has four chromosomes per set for a total of eightchromosomes in its somatic cells. Draw such a cell as it wouldlook in late prophase of meiosis II and prophase of mitosis. Discuss how prophase of meiosis II and prophase of mitosis differfrom each other, and explain how the difference originates.
if during normal division meiosis I does not occur, will meoisis II still proceed?
Which type(s) of cell division (mitosis, meiosis I,meiosis II) reduce(s) the chromosome number byhalf? Which type(s) of cell division can be classifiedas reductional? Which type(s) of cell division can beclassified as equational?
Meiotic nondisjunction is much more likely than mitotic nondisjunction.Based on this observation, would you conclude that meioticnondisjunction is usually due to nondisjunction during meiosisI or meiosis II? Explain your reasoning?
The repeat expansion appears to occur during meiosis but not mitosis. Why mightthis be true?
ntent Ô https://learn.humber.ca/ultra/courses/_182213_1/cl/outline * Question Completion Status: Crossing over during prophase I results in O nondisjunction O reciprocal translocation O duplication O genetic variation QUESTION 4 Genetic variation is accomplished by all but one of the following. Choose the exception. O the events of meiosis I O crossing over independent assortment the events of meiosis II O O O O