Curly hair (C) is dominant over straight hair (c). a heterozygous curly haired woman marries a homozygous straight haired man. with respect to hair.

a. write the genotypes of man and woman

man:

woman;

b. what % of the children will have curly hair

The woman's genotype is Cc (she's heterozygous)

The man's genotype is cc (he's homozygous)

If you make a punnet square it'll look like this (I hope it works out)

C c

c Cc cc

c Cc cc

Since curly hair (C) is dominant, any genotype with a capital C will have curly hair. This means 2/4 or 50% of children will have curly hair