The 9:3:3:1 phenotype ratio is expected in the f2 generation when question 3 options: the genes for the two traits assort independently the genes for the two traits are located on the x chromosome the genes for two traits are very close together on the same chromosome the alleles for each trait have incomplete dominance

Answer: the genes for the two traits assort independently.

The proportion 9:3:3:1 is found when studying two genes at the same time, known as a dihybrid cross. Mendel did this cross and found that the offspring, had 4 different phenotypes, but in different quantities. This ratio led Mendel to develop the law of independent assortment.