Question

"in horses, black color (b), dominates chestnut (b). the trotting gait (t) dominates the pacing gate (t). a cross is made between a horse homozygous for both black color and practicing gait and a horse homozygous for both chestnut color and trotting gait. list the probable genotype and phenotype of offspring resulting from such a cross."

Answer 1

Black color (B) and practising gait (t) horse has a genotype BBtt
Chestnut color (b) and trotting gait (T) horse has a genotype bbTT  
Crossing BBtt  x  bbTT
The genotype of the offspring is going to be BbTt, which means that the phenotype is black color and trotting gait horse.