I'd go with A, if I were you.
Answer:
A.a woman heterozygous for hair curl, a man heterozygous for hair curl will produce 25% straight hair, 75% curly hair
Explanation:
a woman heterozygous for hair curl, a man heterozygous for hair curl will produce 25% straight hair, 75% curly hair
using C as the allele for hair curl:
Cc x Cc will produce the following genotypes: CC, Cc, Cc, cc
25% will be homozygous dominant (curly hair)
50% will be heterozygous (curly hair)
25% will be homozygous recessive (straight hair)
combine the curly hair genotypes since the question asked about phenotypes which results in 75% curly and 25% straight.
The answer is C because you're reusing something for something else
corresponding in function but not in evolutionary origins. From a biology perspective.
