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

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

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