Coarse hair in humans and the presence of freckles are dominant features, soft hair and lack of freckles are recessive.

Coarse hair in humans and the presence of freckles are dominant features, soft hair and lack of freckles are recessive. A heterozygous woman with soft hair and freckles marries a man with coarse hair and no freckles. What kind of children can you expect from this marriage?

Let’s designate the dominant and recessive alleles of the genes: A – hard hair, a – soft hair, B – the presence of freckles, b – the absence of freckles.
a) If the genotype of the father is AAbb, then the children will have coarse hair, but 1/2 children with freckles and 1/2 without freckles;
b) if the father’s genotype is Aabb, then children with coarse hair and freckles, coarse hair and no freckles, with soft hair and freckles, soft hair and no freckles in a ratio of 1: 1: 1: 1.

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