Question

Cross a bay stallion with a cream mare. List all offspring phenotypes as a percentage

Answer 1

Answer:

• buckskin(The horse has a tan or gold colored coat with black points (mane, tail, and lower legs))
• palomino(gold coat and white mane and tail, the degree of whiteness can vary from bright white to yellow)
• smoky black(coat is either black or a few shades lighter than true black)

Explanation:

    A bay horse is a black-based animal with the agouti gene, which is the modifier that limits the horse’s black color to its points (legs, mane, tail, eartips). The black-based horse can be either homozygous for the extension allele (two copies black – EE) or heterozygous (one copy black, one copy red – Ee). Because black is dominant, an Ee horse will appear black-based.

      A horse can carry the agouti gene whether it is black or red (this is why a black horse bred to a chestnut or sorrel horse may produce a bay). It is impossible to tell phenotypically (from looking at the horse) if it is homozygous or heterozygous.

     This means that when you cross a cremello (a sorrel/chestnut with two copies of the cream gene) on a bay (black with agouti), you can get buckskin, palomino or smoky black, depending on the horses’ exact gene combination.

     references:

• wikipedia.com