Polygenic inheritance
A)reflects the influence of a single gene.
B)determines "either-or" traits such as eye colour.
C)cannot be studied because its influence is too broad.
D)influences behavioural and psychological traits such as intelligence.

Question

Quizplus · Accepted Answer

Polygenic inheritance refers to the inheritance of traits that are controlled by multiple genes, with each gene contributing a small additive effect. These traits are often complex and quantitative in nature, rather than "either-or" traits like eye colour. Examples of polygenic traits include height, skin colour, and intelligence, which can be influenced by multiple genes and environmental factors. Therefore, option D is the best choice as it correctly reflects the influence of polygenic inheritance on behavioural and psychological traits like intelligence.

Polygenic Inheritance