Question

The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man.
a) What fraction of their sons would be expected to have G6PD?
b) If the husband had G6PD, would it make a difference in your answer in part (a)?

Answer

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