Which statement about heterozygous alleles is true?

Heterozygous alleles refer to a pair of alleles at a specific gene locus that are different from one another. This genetic configuration is crucial for promoting genetic diversity within a population. When an individual is heterozygous for a trait, it means that they possess one dominant allele and one recessive allele for that particular gene.

This variation is essential for evolution and natural selection, as it allows for a wider range of phenotypes that can adapt to changing environments. The presence of different alleles contributes to the overall genetic health of a population and can lead to traits that enhance survival and reproduction. Thus, stating that heterozygous alleles represent genetic variation accurately reflects their role in genetics, as they introduce diversity in traits passed on to offspring.