You cross two true breeding strains of zucchini, one with green fruit and the other with yellow. The F1 plants are all green , but when these are crossed, the F2 plants consists of 9 green and 7 yellow. How many genes are involved in determining the zucchini color? Using your own symbols, designate which genotypes yield green and which yield yellow zucchinis.© BrainMass Inc. brainmass.com October 9, 2019, 5:54 pm ad1c9bdddf
Phenotypic expression in complimentary gene depends upon the availability of two different gene. It modifies typical Mendelian F2 ratio of 9:3:3:1 into 9:7.