A?
Each individual has 2 copies of each gene. If both alleles are identical (ex: both code for blue eyes), the person is ______________ for that trait. If the alleles are different (ex: one allele codes for blue, the other allele codes for brown), the person is ____________ for that trait.


A.homozygous; heterozygous

B. heterozygous; homozygous

C. isozygous; heterozygous