Flower color in roses is controlled by a single gene with two alleles. R=red and r=white. R is dominant to r. You perform a cross of a red and a white flower. 66 F? flowers are red and 74 flowers are white. If the red flower is a heterozygote, how many red and white flowers would you expect?
35 red, 105 white
0 red, 140 white
105 white, 35 red
140 red, 0 white
70 red, 70 white