Question

In rabbits, short hair(S) is dominant over long hair(s). What genotype and phenotype ratios are expected from a cross between two heterozygous shorthaired rabbits?

Answer 1

Step-by-step explanation:

Among rabbits, short hair is dominant over long hair. What would be the appearance of the

rabbits if a heterozygous short hair female were mated with a homozygous short hair male?

Answer 2

Genotype Phenotype

SS 1/4 Short hair 3/4

Ss 2/4 Short hair 3/4

ss 1/4 Long hair 1/4

Step-by-step explanation:

Both are heterozygous for the trait so we can expect that the cross would be:

Ss x Ss

S s

S SS Ss

s Ss ss

So the resulting off-spring would have the following genotype and phenotype:

1 out of 4 will have a genotype of SS.

2 out of 4 or half will have a genotype of Ss.

1 out of 4 will have a genotype of ss.

But because short hair is dominant the phenotype ratios would differ because Ss and SS would express short hair, so we add up their ration:

Short hair: 1/4 + 2/4 = 3/4

Long hair: 1/4

So in summary:

Genotype Phenotype

SS 1/4 Short hair 3/4

Ss 2/4 Short hair

ss 1/4 Long hair 1/4