Question: Suppose three different genes work together to determine a human height according to polygenic inheritance. Assume each capital letter allele contributes equally to height, and

Suppose three different genes work together to determine a human height according to polygenic inheritance. Assume each “capital letter” allele contributes equally to height, and each “lower case” allele does not contribute. Hence, all individuals with 1 “capital letter” allele are expected to have the same phenotype.

A. How many different phenotypes are possible in the offspring of the cross AaBbDd X AaBbdd?

B. What are the expected frequencies of each?

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