Question

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is ______.

विकल्प

• Sex-linked recessive

• Autosomal dominant

• Sex-linked dominant

• Autosomal recessive

Answer 1

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is sex-linked recessive.

Explanation:

If a genetic disease is passed from a phenotypically normal but carrier female to only some of the male offspring, it indicates a sex-linked recessive inheritance. In such cases, females can be carriers without showing symptoms because they have two X chromosomes, and the defective gene is recessive. Males, having only one X chromosome, exhibit the disease if they inherit the affected X from the carrier mother, leading to the disease manifesting only in some of the male progeny. This pattern is typical for diseases like haemophilia and color blindness.