3) Suppose that an allele, b, of a sex-linked gene, is recessive and lethal. A man marries a woman who is heterozygous for this gene. If this couple had 10 children, what would be the predicted sex ratio of these children (ratio of male children to female children)? a) 1:1 b) 1.5:1 c) 2:1 d) 2.5:1

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