Afamily 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%

Option A

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

XY’

XXXXY’

XXXXY’

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.  

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