Which list shows all possible genotypes for a single gene with two alleles?

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Multiple Choice

Which list shows all possible genotypes for a single gene with two alleles?

Explanation:
In this scenario, a gene with two alleles yields three possible genotypes in a diploid organism: TT (two dominant alleles), Tt (one dominant and one recessive), and tt (two recessive alleles). Any list that leaves out one of these genotypes doesn’t capture all possibilities. The set that includes TT, Tt, and tt covers every possible genotype, making it the correct and complete option. The other lists miss at least one genotype, such as lacking the heterozygous form or the homozygous recessive form.

In this scenario, a gene with two alleles yields three possible genotypes in a diploid organism: TT (two dominant alleles), Tt (one dominant and one recessive), and tt (two recessive alleles). Any list that leaves out one of these genotypes doesn’t capture all possibilities. The set that includes TT, Tt, and tt covers every possible genotype, making it the correct and complete option. The other lists miss at least one genotype, such as lacking the heterozygous form or the homozygous recessive form.

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