Question #6424508Single Choice

Biology

Question

In a pedigree showing inheritance of an X-linked dominant disorder, it is observed that affected fathers never pass the disorder to their sons, but all their daughters are affected. Why is this pattern observed?

Options

Males do not pass X chromosomes to their sons.

Dominant alleles are always expressed, regardless of sex.

Males only pass Y chromosomes to their daughters.

Females are less likely to inherit dominant disorders.

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