40. You are making some extra money by breeding fancy guinea pigs for people who

Question

40.

You are making some extra money by breeding fancy guinea pigs for people who like that sort of thing. You set up a cross in which the parents are true breeding and have phenotypes as follows: the father has black fur and a long tail and the mother has white fur and is tailless. They produce offspring in which all of the males are white and have long tails and all of the females are grey with long tails.

a. Is fur color autosomal or sex linked?

b. Describe which fur color phenotypes are dominant, recessive, co-dominant, or incompletely dominant where appropriate.

c. Is tail length autosomal or sex linked?

d. Describe which tail length phenotypes are dominant, recessive, co-dominant, or incompletely dominant where appropriate.

e. What phenotypic ratios do you expect in the F2 generation.

Explanation / Answer

A. Fur colour is sex-linked.

B. Dominant- White

Recessive- black

Co-Dominant-

Incompletely dominant- Grey

C. Tail length is Autosomal.

D. Dominant- Long tailed

Recessive- tailless

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