Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
3rd Edition
ISBN: 9780135564172
Author: Mark Sanders, John Bowman
Publisher: PEARSON+
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Chapter 3, Problem 7P
Explain how the behavior of homologous chromosomes in meiosis parallels Mendel’s law of segregation for autosomal alleles D and d. During which stage of M phase do these two alleles segregate from one another?
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Students have asked these similar questions
Explain how nondisjunction in meiosis is responsible for chromosome abnormalities such as Down syndrome, Klinefelter syndrome, and Turner syndrome.
An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B ● C D E F G, A B • C D V W X, R S •T U E F G, R S•T U V W Xa. Draw the pairing arrangement of these chromosomes in prophase 1 of meiosis. Mention their gametic composition. b. Draw the alternate, adjacent I, and adjacent II segregation patterns in anaphase I of meiosis. Mention their gametic composition.
A diploid (2n) trihybrid individual with the genotype AaBbDd can make eight genetically different gametes.
2n = 4
n = 2
(1)
A
d.
ID
1 1
2 2
Gt: AaBbDd
Loci A/a and D/d are on chromosome 1 and locus B/b is on chromosome 2. Explain how a gamete containing the alleles A, D and b may be produced by meiosis. Refer
specifically to meiotic events occurring during Prophase I, Metaphase I, Anaphase I and Anaphase II. (NB: remember to refer to the organism above).
CO
Chapter 3 Solutions
Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
Ch. 3 - Examine the following diagrams of cells from an...Ch. 3 - Our closest primate relative, the chimpanzee, has...Ch. 3 -
3. In a test of his chromosome theory of...Ch. 3 - Cohesion between sister chromatids, as well as...Ch. 3 - 5. The diploid number of the hypothetical animal...Ch. 3 - 6. An organism has alleles R1 and R2 on one pair...Ch. 3 - Explain how the behavior of homologous chromosomes...Ch. 3 - 8. Suppose crossover occurs between the homologous...Ch. 3 -
9. Alleles A and a are on one pair of autosomes,...Ch. 3 - Prob. 10P
Ch. 3 - Describe the role of the following structures or...Ch. 3 - A womans father has ornithine transcarbamylase...Ch. 3 - In humans, hemophilia A (OMIM 306700) is an...Ch. 3 -
14. A wild-type male and a wild-type female...Ch. 3 - 15. A woman with severe discoloration of her tooth...Ch. 3 - 16. In a large metropolitan hospital, cells from...Ch. 3 - In cats, tortoiseshell coat color appears in...Ch. 3 - 18. The gene causing Coffin–Lowry syndrome (OMIM...Ch. 3 - 19. Four eye-color mutants in Drosophila—apricot,...Ch. 3 - 20. For each pedigree shown,
a. Identify which...Ch. 3 - 21. Use the blank pedigrees provided to depict...Ch. 3 - 22. Figure 3.22 (page 89) illustrates reciprocal...Ch. 3 - 23. In fruit flies, yellow body (y) is recessive...Ch. 3 - 24. In a species of fish, a black spot on the...Ch. 3 - LeschNyhan syndrome (OMIM 300322) is a rare...Ch. 3 - 26. In humans, SRY is located near a...Ch. 3 - 27. In an 1889 book titled Natural Inheritance...Ch. 3 - 28. In Drosophila, the X-linked echinus eye...Ch. 3 - 29. A wild-type Drosophila male and female are...Ch. 3 - 30. Drosophila has a diploid chromosome number of...Ch. 3 - The cell cycle operates in the same way in all...Ch. 3 - 33. Form a small discussion group and decide on...Ch. 3 - 34. Duchenne muscular dystrophy (DMD; OMIM 310200)...Ch. 3 - Prob. 35P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B • C D E F G A B • C D V W X R S • T U E F G R S • T U V W X a. Draw the pairing arrangement of these chromosomes in prophase I of meiosis. b. Diagram the alternate, adjacent-1, and adjacent-2 segregation patterns in anaphase I of meiosis. c. Give the products that result from alternate, adjacent-1, and adjacent-2 segregation.arrow_forwardIn fruit flies, chromosomal crossing over does not occur in meiosis in males, whereas crossing over does occur in meiosis in females. In fruit flies that are heterozygous at many genes (i.e. many maternal and paternal versions of the genes differ), at what stage would cells no longer be heterozygous for any gene during the process of meiosis? a)After the second meiotic division in males, and after the first meiotic division in females. b)After the second meiotic division in both males and females. c)After the first meiotic division in both males and females. d)After the first meiotic division in males, and after the second meiotic division in females.arrow_forwardDetermine whether the chromosomes are most difficult to segregate properly during meiosis in Down syndrome and Edwards syndrome.arrow_forward
- An individual has the following reciprocal translocation: I - SKLM CDE CDE H B B H M e. What is the name of the structure formed during meiosis, as the chromosomes attempt to synapse? f. What would be the outcome of alternate segregation? g. What would be the outcome of adjacent-1 segregation? h. What would be the outcome of adjacent-2 segregation?| (NOTE: A-B--C-D-E or A-B-O-C-D-E are acceptable formats for chromosome structure)arrow_forwardWhich one of the following panels (A-D) illustrates the segregation of alleles on chromosomes in a cell of genotype M/m; B/b undergoing anaphase of mitosis?arrow_forwardDuring meiosis, does random assortment occur before or after crossing-over?arrow_forward
- Explain why autosomal aneuploidy is generally more deleterious than aneuploidy for sex chromosomes.arrow_forwardWhat aspect of chromosome behaviour most clearly accounts for Mendel's law of segregation? Crossing-over between homologous chromosomes during prophase I of meiosis Movement of sister chromatids to opposite poles at anaphase II of meiosis Movement of homologous chromosomes to opposite poles at anaphase I of meiosis Independent alignment of different homologous pairs on the metaphase I spindle Replication of chromosomes prior to meiosisarrow_forwardDescribe the Principles of Segregation and Independent Assortment in terms of Genetics. How do these Principles express during Meiosis?arrow_forward
- Explain why heterozygotes for inversions and translocations have low fertility.arrow_forwardThough an individual with abberations such as Robertsonian translocation may be phenotypically normal, they can generate gametes through meiosis that have atypical organizations of chromosomes, resulting in recurrent fetal abnormalities or miscarriages. Why, despite these Robertsonian translocations, are affected cells still able to generate typical gametes through meiosis?arrow_forwardAssume that a meiotic-nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?arrow_forward
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