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In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D. In other words, plants with the genotype K- D- will not produce pigment (and their flowers will be white) because of the presence of the D allele. If two dihybrid plants (KkDd) are crossed, how many plants would you EXPECT to need to grow to get 15 blue flowering primrose plants?Note: Put in a number based on the phenotypic ratio.
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