Exactly three out of four offspring are tall. Suppose that the allele A for height is dominant,

Question:

Exactly three out of four offspring are tall.
Suppose that the allele A for height is dominant, meaning that plants with genotypes AA and Aa are tall, while those with genotype aa are short. If an Aa plant is crossed with another Aa plant, 3/4 of the offspring should be tall. Assuming that the other conditions for the binomial are met, find the probabilities of the above.
Distribution
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