Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Assume that two fully heterozygous plants are crossed. Give the phenotypes (with

frequencies) of the offspring.

A) 12 white : 3 yellow : 1 green
B) 3 white : 9 yellow : 4 green
C) 4 white :9 yellow : 3 green
D) 12 white : 1 yellow : 3 green
E) 9 white : 3 yellow : 4 green


Answer: A

Biology & Microbiology

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