In a species of alpine campion, the allele for jagged leaf margins (JJJ) is dominant to the allele for smooth leaf margins (jjj). Petal colour in this species is controlled by a single gene with two alleles, CBC^BCB (blue) and CYC^YCY (yellow). When homozygous blue-flowered campions are crossed with homozygous yellow-flowered campions, all of the F1F_1F1 generation have green flowers.
Name the genetic relationship shown by the two alleles that determine petal colour.
A smooth-leaved, green-flowered plant is crossed with a plant that is heterozygous for jagged leaves and has yellow flowers. State the genotypes of both parents, and determine the expected genotypes, phenotypes, and ratio of the offspring.
A large, isolated population of this campion species is in Hardy-Weinberg equilibrium. In this population, 9% of the plants have blue flowers. Calculate the percentage of green-flowered plants in this population. Show your working.
