Question

The recessive genes located on X chromosome in humans are always ______.

विकल्प

• sub-lethal

• expressed in males

• expressed in females

• lethal

Answer 1

The recessive genes located on X chromosome in humans are always expressed in males.

Explanation:

A male has only one X chromosome, so a recessive allele on it is expressed because the Y chromosome usually lacks a corresponding allele. Females generally need two copies for expression.