Question

In guinea pigs, the allele for short hair(H) is dominant. If all the guinea pigs are born short haired in F1, what are the possible genotypes of the male and female parents?

• A. HH and hh
• B. HH and HH
• C. hh and hh
• D. Hh and Hh

Answer 1

Answer: (A), (B), (D)

The correct options are
A

HH and hh

B

HH and HH

D

Hh and Hh

Short hair is dominant which means it can express in both heterozygous(Hh) and homozygous condition(HH). If all the progeny have short hair, then the parents should have been either:

HH x HH OR HH x Hh OR HH x hh