In a species of plant, the allele for a hairy stem (HHH) is dominant to the allele for a hairless stem (hhh). In the same species, flower colour is determined by two alleles, FRF^RFR (red) and FYF^YFY (yellow). When homozygous red-flowered plants are crossed with homozygous yellow-flowered plants, all the offspring have orange flowers.
Name the genetic relationship shown by the two alleles that code for flower colour.
A hairless, orange-flowered plant is crossed with a heterozygous hairy, yellow-flowered plant. State the genotypes of the parents, and determine the expected genotypes, phenotypes, and ratio of the offspring.
An isolated population of this plant species contains 16% yellow-flowered plants. Assuming the population is in Hardy-Weinberg equilibrium, calculate the percentage of orange-flowered plants in this population. Show your working.
