In horses,black coat color is influenced by the dominant allele (B),and chestnut coat color is influenced by the recessive allele (b).Trotting gait is due to a dominant gene (T),pacing gait to the recessive allele (t).If a homozygous black trotter is crossed to a chestnut pacer,which phenotype will be the most common in the F2 generation?
A) Black pacer
B) Black trotter
C) Chestnut trotter
D) Chestnut pacer
E) Both black and chestnut pacers

Question

In horses,black coat color is influenced by the dominant allele (B),and chestnut coat color is influenced by the recessive allele (b).Trotting gait is due to a dominant gene (T),pacing gait to the recessive allele (t).If a homozygous black trotter is crossed to a chestnut pacer,which phenotype will be the most common in the F2 generation?  
A) Black pacer
B) Black trotter
C) Chestnut trotter
D) Chestnut pacer
E) Both black and chestnut pacers

Quizplus · Accepted Answer

In the F1 generation, all offspring will be heterozygous black trotters (BbTt). In the F2 generation, the phenotypic ratio for a dihybrid cross is 9:3:3:1, with black trotters being the most common phenotype.

In Horses,black Coat Color Is Influenced by the Dominant Allele