you are studying two traits in fruit flies: eye color where there are two colors, brown and red, and wing shape where there are straight and curled phenotypes. you mate two flies that are heterozygous for the genes that control both of these traits and get the following phenotypes in the following ratio: 9 red and straight; 3 red and curled; 3 brown and straight; 1 brown and curled. considering these traits, which alleles separated at which stages of meiosis?