In a monohybrid cross AA × aa, what proportion of heterozygotes is expected among the F₂ offspring? A)1/4 B)1/2 C)3/4 D)All are heterozygotes. E)None are heterozygotes.

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In a monohybrid cross between a homozygous dominant (AA) and a homozygous recessive (aa) individual, all the F1 offspring will be heterozygotes (Aa), making the proportion of heterozygotes 1/2.

In a Monohybrid Cross AA × Aa, What Proportion of Heterozygotes