Question

You are viewing a pedigree and trying to determine the inheritance pattern of a trait. List three characteristics that, if observed, would indicate that the trait is X-linked recessive?

Answer 1

Answer:

X linked inheritance is one of the mechanisms of the inheritance which is associated with the mutation of the gene present on the X chromosome.

The characteristics of the X linked recessive inheritance that must be observed in the pedigree analysis will be-

1. X linked trait is always passed from the mother to the sons (females to males)

2. The males (XY) are usually affected by the gene as only one copy of the recessive gene in males can show its effect.

3. Females are the carrier of the disease but they are not affected by the condition.