Resposta
One quarter, or 25%.
Explicação
The cross gives AA, Aa, Aa, and aa. Only aa shows the recessive trait, so 1/4 of the offspring are expected to show it.
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Two heterozygous parents (Aa x Aa) are crossed. What fraction of the offspring is expected to show the recessive trait?
Flashcard de estudo do deck European Baccalaureate essentials: original practice.