Poultry Judging Practice Test

Which pigment contributes to the yellow coloration in the skin, beak, and shanks of many poultry breeds?

1. Carotene

2. Xanthophyll

3. Chlorophyll

4. Melanin

The correct answer is: Xanthophyll

The pigment responsible for the yellow coloration in the skin, beak, and shanks of many poultry breeds is xanthophyll. Xanthophyll is a type of carotenoid, a class of naturally occurring pigments found in plants and in some microorganisms, which plays a significant role in the coloration of animal tissues. In poultry, particularly in breeds that are selected for their yellow skin and leg coloration, xanthophyll is crucial because it is deposited in the skin and other tissues during the chicken's development. The presence of xanthophyll not only contributes to the visual appeal of birds for consumers but also indicates good health and proper nutrition, as birds with adequate levels of this pigment typically receive a diet rich in green plants, corn, or alfalfa. While carotene is another pigment that contributes to coloration in animals, xanthophyll specifically is the one primarily known for imparting the yellow hue observed in poultry. Melanin is associated with darker pigmentation, and chlorophyll is responsible for the green coloration in plants. Therefore, xanthophyll's unique characteristics and its role in poultry pigmentation make it the correct answer.