Question

to be heterozygous for a trait, the individual must have a copy of the recessive allele and a copy of the dominant allele for that trait. what does it look like when an individual is heterozygous for a trait? aa aa

Explanation:

Heterozygous means having one dominant (e.g., A) and one recessive (e.g., a) allele. "Aa" has both, while "aa" has two recessive alleles (homozygous recessive). So the heterozygous genotype is Aa.

Answer:

A. Aa