Independent Assortment Predicts a 9:3:3:1 Ratio with Four Different Phenotypes

question 23

Multiple Choice

Independent assortment predicts a 9:3:3:1 ratio with four different phenotypes in the F2 progeny. If the alleles are epistatic, what would you predict?

• A) heterozygotes with a novel phenotype between the dominant and recessive homozygotes
• B) 1/3 of the progeny with the dominant phenotypes and 2/3 recessive
• C) more than four phenotypes
• D) fewer than four phenotypes
• E) no change in the 9:3:3:1 ratio