In genetics, what is the genotype for heterozygous dominant?

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Multiple Choice

In genetics, what is the genotype for heterozygous dominant?

Explanation:
Heterozygous means having two different alleles at a gene locus, and dominant means one allele can mask the other. For a gene with alleles A (dominant) and a (recessive), the combination Aa is a heterozygous genotype. It carries one dominant A allele and one recessive a allele, so the dominant trait is expressed. In contrast, AA is homozygous dominant (two A alleles) and aa is homozygous recessive (two a alleles). The option with BB isn’t part of this A/a pair, so it doesn’t describe this gene.

Heterozygous means having two different alleles at a gene locus, and dominant means one allele can mask the other. For a gene with alleles A (dominant) and a (recessive), the combination Aa is a heterozygous genotype. It carries one dominant A allele and one recessive a allele, so the dominant trait is expressed.

In contrast, AA is homozygous dominant (two A alleles) and aa is homozygous recessive (two a alleles). The option with BB isn’t part of this A/a pair, so it doesn’t describe this gene.

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