7.7 Genes a and b are 20 cM apart. An at b*la* b* individual was mated with an a bla b individual. (a) Diagram the cross and show the gametes produced by each parent and the genotype of the F₁. (b) What gametes can the F₁ produce, and in what proportions? (c) If the F, was crossed to a bla b individuals, what off- spring would be expected, and in what proportions? (d) Is this an example of the coupling or repulsion link- age phase? (e) If the F, were intercrossed, what offspring would be expected, and in what proportions?
7.7 Genes a and b are 20 cM apart. An at b*la* b* individual was mated with an a bla b individual. (a) Diagram the cross and show the gametes produced by each parent and the genotype of the F₁. (b) What gametes can the F₁ produce, and in what proportions? (c) If the F, was crossed to a bla b individuals, what off- spring would be expected, and in what proportions? (d) Is this an example of the coupling or repulsion link- age phase? (e) If the F, were intercrossed, what offspring would be expected, and in what proportions?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:**Genetic Cross Problem: Exercise 7.7**
Genes *a* and *b* are 20 cM apart. An *a⁺ b⁺/a⁺ b⁺* individual was mated with an *a b/a b* individual.
(a) **Diagram the Cross**: Show the gametes produced by each parent and the genotype of the F₁.
(b) **F₁ Gametes**: What gametes can the F₁ produce, and in what proportions?
(c) **Crossing F₁ with *a b/a b***: If the F₁ was crossed to *a b/a b* individuals, what offspring would be expected, and in what proportions?
(d) **Linkage Phase**: Is this an example of the coupling or repulsion linkage phase?
(e) **Intercrossing F₁**: If the F₁ were intercrossed, what offspring would be expected, and in what proportions?
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