Which trait does not have a high heritability in sheep?

• A. Grease fleece weight
• B. Birthweight
• C. Cutting ability
• D. Staple length

Answer: (C)

Cutting ability does not have a high heritability in sheep because it is influenced by a variety of environmental factors along with genetic makeup. This trait encompasses the sheep's ability to produce wool that can be effectively sheared, which is affected by diet, management practices, and overall health of the animal, in addition to genetic predispositions. High heritability traits, like grease fleece weight, birthweight, and staple length, tend to be more strongly influenced by genetic factors and show a clearer inheritance pattern across generations. This means that while genetics play a role in cutting ability, the environmental impacts are substantial enough to lower its heritability compared to the other traits listed.