Question

A family has a Y-linked disease that affects the father. What is the chance of a male offspring inheriting the same disease? A. 100% B. 50% C. 25% or D. 0%

Answer 1

there could be a 50 % chance

Answer 2

Option A

Step-by-step explanation:

The father’s genotype would be XY’

Where Y’ represents the disease affected male chromosome.

Let the mothers genotype be “XX”

If the Y-linked disease affected male is crossed with a healthy female, the following offsrpings will be produced

X Y’

X XX XY’

X XX XY’

Thus, total two male offspring’s are produced and both the male offsprings have affected Y’ chromosome . Thus , in case where a disease is Y-linked all the male offsprings produced would be disease affected.