Many of the Color Varieties of Summer Squash Are Determined

Multiple Choice

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.Crosses among heterozygotes give a 12:3:1 ratio.What type of gene interaction would account for these results?

A) multiple alleles
B) epistasis
C) incomplete dominance
D) conditional lethal
E) complementation