In horses, black color dominates over chestnut color, trotting gait dominates over gait

In horses, black color dominates over chestnut color, trotting gait dominates over gait, the phenotype of the offspring F1-? from crossing a black gait with a walk (innokhod) with a homozygous chestnut trotter F2 – from crossing animals from the first generation.

Let the gene for the black color of the horse’s coat be B, then the gene for the chestnut coat will be b.

Let the gene that causes the trotting gait in horses be C, then the gene that leads to the gait will be c.

A homozygous chestnut amber horse will be recorded, according to the introduced designations, as bbCC, it will produce VS germ cells.

A black horse that has a gait characterized as a gait will be recorded as BBss or BBss. Considering the condition of the problem, let this horse be also homozygous – BBcc. It will produce the sex cells of the Sun.

The F1 offspring, obtained by crossing the described horses with each other, will look as follows: ВbСс – 100%, black foals with a trotting gait. Such foals will subsequently produce sex cells BC, bc, bC and Bc.

If we cross such individuals with each other, we get the following offspring:

black foals with a trotting gait (2ВbСС, ВВСС, 2ВВСс, 4ВbСс);

chestnut foals with a trotting gait (2bbСс, bbСС);

chestnut foals with gait (bbcc);

black foals with a gait step (2Bbcc, BBcc).