In horses, the Extension gene helps to determine coat color. The dominant trait (E) produces black pigment in the coat. The recessive trait (e) produces red pigment. Would a cross between a stallion who is homozygous, EE, and a mare who is heterozygous, Ee, ever produce a foal with a red coat? (1 point) • Yes, because the stallion's dominant allele and the mare's recessive allele can result in a red coat

Question

In horses, the Extension gene helps to determine coat color. The dominant trait (E) produces black pigment in the coat. The recessive trait (e) produces red pigment. Would a cross between a stallion who is homozygous, EE, and a mare who is heterozygous, Ee, ever produce a foal with a red coat? (1 point) • Yes, because the stallion's dominant allele and the mare's recessive allele can result in a red coat 
• No, because there would have to be two recessive alleles for the foal to have a red coat. 
• No, because the mare cannot pass on her recessive allele. 
• Yes, because jhe mare can pass on her recessive allcle

GPT-4o mini · Accepted Answer

The correct answer is:

• No, because there would have to be two recessive alleles for the foal to have a red coat.

In this case, the stallion is homozygous for the black coat (EE) and the mare is heterozygous (Ee). The possible allele combinations for their offspring would be EE and Ee. Since a foal would need to inherit one recessive allele (e) from each parent to have a red coat (ee), it is not possible for the offspring to have a red coat with this cross.