Horses have three basic coat colors: red (or chestnut), bay, and black. All the colors are controlled by the interaction of two genes, called Extension (E) and Agouti (A). The following combinations produce the bay color: EE/Aa, EeAa, EE/AA, and Ee/AA. Only two produce black color: EE/aa and Ea/aa. Other combinations of the alleles of these genes plus mutations of other genes result in many possible coat colors and patterns in horses.

Question

Horses have three basic coat colors: red (or chestnut), bay, and black.  All the colors are controlled by the interaction of two genes, called Extension (E) and Agouti (A). The following combinations produce the bay color: EE/Aa, EeAa, EE/AA, and Ee/AA. Only two produce black color: EE/aa and Ea/aa. Other combinations of the alleles of these genes plus mutations of other genes result in many possible coat colors and patterns in horses.

What type of inheritance does coat color in horses represent?

(1 point)
Responses

dominant inheritance
dominant inheritance

polygenic inheritance
polygenic inheritance

mendelian inheritance
mendelian inheritance

recessive inheritance

GPT-4o mini · Answer

The coat color in horses represents **polygenic inheritance**. This is because multiple genes (in this case, the Extension and Agouti genes) interact to produce the different coat color phenotypes observed in horses.