In the multiple-allele series that determines coat color in rabbits, c + encodes agouti, cch encodes chinchilla, and ch encodes Himalayan. Dominance within this allelic series is c+> cch > ch. In a cross between c+/ch and cch/ch, what proportion of progeny will be chinchilla?

1/4

Explanation:

Dominance within this multiple-allele series is c + (agouti) > cch (chinchilla) > ch (himalayan).

A cross between c+/ch x cch/ch was done.

The possible genotypes of the offspring are:

c+/cch: agouti c+/ch: agouti ch/cch: chinchilla ch/ch: himalayan

So 1/4 of the progeny will be chinchilla.