In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves (r). Yellow fruits (Y) are dominant to white fruits (y). A true-breeding round-leaved, yellow-fruited plant is mated with a true-breeding jagged-leaved, white-fruited plant. What are the genotypes of the plants involved in this cross?

Question

In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves (r). Yellow fruits (Y) are dominant to white fruits (y). A true-breeding round-leaved, yellow-fruited plant is mated with a true-breeding jagged-leaved, white-fruited plant. What are the genotypes of the plants involved in this cross?

a. RRYY × rryy
b. RrYy × RrYy
c. cannot determine from the information given
d. RRYY × RRYY

Answer 1

The genotypes of the plants involved in this cross are:

a. RRYY × rryy

This means that the first plant is homozygous dominant for both traits (round leaves and yellow fruits) and the second plant is homozygous recessive for both traits (jagged leaves and white fruits).