Which genotypes represent homozygous for a gene with two alleles T and t?

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Multiple Choice

Which genotypes represent homozygous for a gene with two alleles T and t?

Explanation:
Homozygous means having two identical alleles for a gene. For a gene with two alleles, T and t, the genotypes with two identical alleles are TT and tt. A genotype with one of each allele, Tt, is heterozygous. So the genotypes that are homozygous are TT and tt, which is why those two forms are included as the correct understanding.

Homozygous means having two identical alleles for a gene. For a gene with two alleles, T and t, the genotypes with two identical alleles are TT and tt. A genotype with one of each allele, Tt, is heterozygous. So the genotypes that are homozygous are TT and tt, which is why those two forms are included as the correct understanding.

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