If an organism is heterozygous for a particular trait, the organism.

A.has the same allele on both chromosomes in a chromosome pair.

B.has different alleles on the chromosomes in a chromosome pair.*

C.is missing alleles on the chromosomes in a chromosome pair.

D.has extra alleles on both chromosomes in a chromosome pair.

2 answers

agree
has different alleles on the chromosomes in a chromosome pair.