12. What is the tern for the pattern of inheritance in which many genes influence a trait? a. Polymorphic inheritance b. Polygenic inheritance c. Monomorphic inheritance d. Monogenic inheritance

Answer: Polygenic inheritance

Explanation:

Polygenic inheritance is a phenomenon shown by a trait that is controlled by many genes residing at different loci.

Thus, the expression of the trait is the total effect of all the genes controlling it. Skin colour and height in humans are examples of such traits.

B. Polygenic inheritance

Explanation:

Polygenic inheritance is a genetic situation where a trait is influenced by 2 or more genes. The genes don't usually dominate each other but rather they give additive effects to the traits. Examples of polygenic inheritance include eye colour, hair colour, skin colour, height, weight etc