Based on this information, what is this fly's phenotype for the antenna type trait?

 - mutated antennae
 - normal antennae
You need to determine the fruit fly's phenotype for the antenna type trait. First, consider the alleles in the fly's genotype for the antenna type gene. Then, decide whether these alleles are dominant or recessive.
The allele for normal antennae (a) is recessive to the allele for mutated antennae (A). This means A is a dominant allele, and a is a recessive allele.
The fruit fly's genotype of Aa has one dominant allele and one recessive allele. An organism with at least one dominant allele for a gene will have the dominant allele's version of the trait. So, the fruit fly's phenotype for the antenna type trait must be mutated antennae.