Question

In rabbits, C= agouti coat color, cch chinchilla, ch Himalayan, and The four alleles constitute a multiple allelic series. The agouti C is dominant to the other three alleles, c is recessive to the other three alleles, and chinchilla is dominant to Himalayan. Determine the phenotypes of progeny from the following crosses:
a. C/C x c/c
b. C/cch x C/c
c. C/c x C/c
d. C/ch x ch/c
e. C/ch x c/c

Answer 1

Answer:

the answer is given by the bone of punet boxes

a. C/C x c/c

C C

c Cc Cc

c Cc Cc

100% agouti coat

In this case C is dominant

b. C/cch x C/c

C cch

C CC Cch

c Cc cchc

75% agouti coat color with the genotypes CC, Cch  and Cc. C is dominant.

25% chinchilla because c is recessive to cch.

c.. C/c x C/c

C c

C CC Cc

c Cc cc

75% agouti coat color with the genotypes CC and Cc.C is dominant.

25% cc

d. C/ch x ch/c

C ch

ch Cch chch

c Cc cch

50% agouti coat color with the genotypes Cch and Cc.C is dominant.

50% Himalayan with the genotypes chch and cch

e.C/ch x c/c

C ch

c Cc cch

c Cc cch

50% agouti coat color with the genotypes Cc .C is dominant

50% Himalayan with the genotypes cch

Explanation: