Suppose that pattern baldness is caused by a single autosomal gene mutation that has a dominant impact in males (both one or two copies of the mutation trigger pattern baldness) and recessive impact in females (two copies of the mutation trigger pattern baldness). A second gene on a completely different autosomal chromosome impacts hair shade with a ressive mutation that ends in mild hair as an alternative of darkish hair. Mary has no pattern baldness and darkish hair, Her mom had pattern baldness and darkish hair and her father had no pattern baldness and lightweight hair. Mary marries John who has no pattern baldness and lightweight hair. If a son is born to the couple what is likelihood that he has pattern baldness and darkish hair like his maternal grandmother?

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