Question

Read the following and answer from given below:

According to Mendel, one gene controls the expression of one character only. The ability of a gene to have multiple phenotypic effects because it influences a number of characters are an exception. The gene has multiple phenotypic effects because its ability to control two or more characters can be seen in cotton. In cotton, a gene for the lint also influences the height of the plant, size of the ball, number of ovules, and viability of seeds.

Which of the following is an example of a gene with multiple phenotypic effects?

Options

• Drosophila white eye mutation

• Kernel colour in wheat

• Height in human beings

• Skin colour in human beings

Answer 1

Drosophila white eye mutation

Explanation:

Kernel colour in wheat, height in human beings and skin colour in human beings are examples of polygenic inheritance, i.e., inheritance controlled by three or more genes. In Drosophila, white eye mutation pleiotropic effect, it causes depigmentation in any part of the body.