The mutations are alleles of linked genes | Homework Help

You are investigating two hypothetical traits in cows: the ability to sing and the ability to talk to ants. Both ofthese traits are recessive to the wildtype (not singing or talkingto ants). Since both of these mutations involve vocalization,it is possible that they are encoded by alleles of the samegene. You must also consider the possibility that the traitsare encoded by alleles of different genes, which may or may not belinked. If a true breeding singing cow is crossed to a truebreeding cow that talks to ants, what are the parental genotypesand F1 progeny phenotypes and genotypes expected in each of thefollowing cases:

a. The mutations are alleles of linked genes. Explainanswer.

b. The mutations are alleles of the same gene. Explainanswer.

c. The mutations are alleles of unlinked genes. Explainanswer.

Assume complete penetrance for both traits, and assume thatepistasis does not occur.

Thanks Lark! There is an aIDitional part of the question Iforgot to put down. I was wondering if you could help mesolve it.

Here’s the aIDitional question:

“If a testcross between a singing, ant-talking cow and one of thewildtype F1 progeny described above is performed, what F1 progenyphenotypes and genotype ratios are expected if:

d. The mutations are alleles of linked genes. Explainanswer.

e. The mutations are alleles of unlinked genes. Explainanswer.”