In a monohybrid cross Aa x Aa, what is the genotype ratio of offspring?

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Multiple Choice

In a monohybrid cross Aa x Aa, what is the genotype ratio of offspring?

Explanation:
When two heterozygotes cross, each parent can contribute either the dominant allele or the recessive allele with equal chance. From Aa x Aa, the possible offspring genotypes are AA, Aa, Aa, and aa. Each of these four outcomes is equally likely, so the genotype distribution is 1 AA : 2 Aa : 1 aa. This is why the genotype ratio is 1:2:1, meaning one is homozygous dominant, two are heterozygous, and one is homozygous recessive.

When two heterozygotes cross, each parent can contribute either the dominant allele or the recessive allele with equal chance. From Aa x Aa, the possible offspring genotypes are AA, Aa, Aa, and aa. Each of these four outcomes is equally likely, so the genotype distribution is 1 AA : 2 Aa : 1 aa. This is why the genotype ratio is 1:2:1, meaning one is homozygous dominant, two are heterozygous, and one is homozygous recessive.

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