Question

Which of the following statement is true for X-linked recessive inheritance?

• A. All sons of a normal mother should show the trait.
• B. All sons of an affected mother should show the trait.
• C. Many more females than males should exhibit the trait.
• D. All daughters of a normal mother should show the trait.

Hint:

Understand the inheritance pattern of X-linked recessive traits and how it differs between males and females.

Answer 1

The Correct Option is B

In X-linked recessive inheritance, an affected mother transmits a defective X chromosome to all her sons. Males, possessing only one X chromosome, will always exhibit the trait upon inheriting the defective gene. Females are less commonly affected, as two copies of the defective gene are necessary for trait manifestation.