When Mendel set up a Parental (P) cross between true breeding purple and white flowered plants to generate the F1 and then allowed the F1 to self-pollinate to generate the F2 he saw a dominant to recessive ratio of 3:1. What phenotypic ratio would be expected if he crossed the F1 with the original purple parent?
A) 4:0
B) 1:1
C) 3:1
D) 9:3:3:1

Question

Quizplus · Accepted Answer

When Mendel crossed the F1 generation (which are all heterozygous for the flower color trait) with the original purple parent (which is homozygous dominant), all offspring would have at least one dominant allele for purple color, resulting in a 4:0 ratio of purple to white flowers.

When Mendel Set Up a Parental (P) Cross Between True