Biology Interview Question:

Assuming a male mammal has an x-linked recessive gene which exhibits a certain characteristic phenotypic trait, which of the following is NOT true:

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1. all of his daughters will be carriers
2. all of his sons will exhibit the trait
3. there is a 50% chance his daughters will pass the recessive allele to their sons
4. none of his sons will pass the recessive allele

Answer: B
Submitted by: Administrator