Question

In guinea pigs, short hair (H) is dominant to long hair (h). Two heterozygous (hybrid) guinea pigs are crossed. Complete the Punnett Square and analysis.

Answer 1

Answer: The results with heterozygous parents that have short hair (H) dominant and long hair (h) recessive genes will yield; 25% (HH - Short hair), 50% (Hh - Short hair), and 25% (hh - Long hair) offspring. From a phenotype perspective, these are 75% short hair and 25% long hair.

Step-by-step explanation:

The Punnett Square:

H h

H HH Hh

h Hh hh

Answer 2

Given, short hair (H) is dominant to long hair (h). Hence, guinea pigs with HH and Hh genotype will have short hair whereas those with hh genotype will have long hair.

Both the parents are heterozygous (Hh).

When Hh X Hh :

H h

H HH Hh

h Hh hh

Resultant genotype ratio =

1 : 2 : 1 ( HH : Hh : hh )

Resultant phenotype ratio =

3 : 1 ( short hair : long hair )