Target Exam

CUET

Subject

Biology

Chapter

Principles of Inheritance and Variation

Question:

Which of the following is an example of polygenic inheritance?

Options:

Sickle-cell anemia

Skin color in humans

Phenylketonuria

All of these

Correct Answer:

Skin color in humans

Explanation:

The correct answer is Option (2) -Skin color in humans

Polygenic inheritance involves the influence of multiple genes on a single phenotypic trait. Polygenic inheritance is an inheritance pattern controlled by three or more genes (multiple genes) and the graded phenotypes are due to the additive or cumulative effect of all the different genes of the trait. An example of human skin colour to understand the phenomenon of polygenic inheritance.