Problem

Solutions For An Introduction to Genetic Analysis Chapter 3 Problem 20P

Solution 1

The trait of dwarfism is linked to an X-linked recessive allele. The trait of a pink coat is linked to an allele, which is autosomally dominant.

• The genotype of the dwarf female is denoted by: X^d/X^d p/p, since it is a dwarf, but not pink.

• The genotype of the pink male is denoted by X^D/Y P/P, since it has a pink coat, but is not dwarf.

The genotypes of the parents, their gametes, and the genotypes of the F₁ progeny are as follows:

Parents: X^dX^dpp x X^DY PP

F₁ progeny:

o X^DX^dPp - Normal Pink female - 50%

o X^dY Pp - Dwarf Pink male - 50%

Thus, the phenotypic ratio of F₁ generation is.

Cross between the F ₁ progeny is as follows:

X ^D X ^d Pp x X^dY Pp

Thus, the phenotypic ration of F₂ females and males is as follows:

• Normal Pink – 3

• Dwarf Pink – 3

• Normal Brown – 1

• Dwarf Brown – 1

• Normal Pink – 3

• Dwarf Pink – 3

• Normal Brown – 1

• Dwarf Brown – 1

Add your Solution

Textbook Solutions and Answers Search

Solutions For Problems in Chapter 3

Free Homework Help App

Scan Your Homework
to Get Instant Free Answers

Need Online Homework Help?

Get Answers For Free
Most questions answered within 3 hours.

Recent Solutions