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What ratio did mendel observe in the f2 offspring in monohybrid crosses between true-breeding lines for dominant and recessive traits?

User Gregnr
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Observing that true-breeding pea plants with contrasting traits gave rise to F1 generations that all expressed the dominant trait and F2 generations that expressed the dominant and recessive traits in a 3:1 ratio, Mendel proposed the law of segregation.
User ScottG
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