Hairlessness in dogs is inherited from a single dominant allele.Inheriting two dominant alleles is lethal for an embryo.Penelope,a hairless dog mates with Arnold,a dog with hair.The probability Penelope will have hairless puppies is
A)3/4.
B)2/3.
C)1/4.
D)1/2.

Question

Quizplus · Accepted Answer

Penelope must be heterozygous (Hh) since two dominant alleles (HH) are lethal. Arnold is homozygous recessive (hh). The possible offspring are Hh (hairless) and hh (with hair), so the probability of hairless puppies is 1/2.

Hairlessness in Dogs Is Inherited from a Single Dominant Allele