Under what conditions does one observe a 9:3:3:1 ratio? A 1:1:1:1 ratio? Which laws proposed by Mendel are supported by these ratios? Why? Consider a trihybrid self cross AaBbCc X AaBbCc. How many total and different genotypes are expected? How many different phenotypic classes are expected? Explain your answer clearly.

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A 9331 ratio is observed in a dihybrid cross of two heterozygotes ... View the full answer