Question

S. superis is a rare flowering plant that can produce blooms in two colours, purple (P) and teal (p), and two shapes, four petals (F) and seven petals (f). Purple is dominant to teal, and four is dominant to seven petals. S. superis is a diploid organism, 2n = 4, that can both self- fertilize and mate with other plants of the same species (out-cross). You find one of these rare plants in your garden and it has purple flowers with four petals. Assuming this lonely plant must self-fertilize what potential offspring phenotypes could you see? Select one: a. Purple with seven petals b. Purple with four petals o oo c. Teal with seven petals d. All of the phenotypes listed are possible depending on the genotype of the plant. O

Answer 1

Purple and 4 petals both are dominant traits. When a plant is purple and 4 petaled, it can be homozygous dominant or heterozygous dominant. If the two parents are homozygous dominant, only purple and 4 petaled flowers can be seen in offspring. But if the parents are heterozygous, one can see all possible combinations given.

D. All phenotypes are possible depending on the genotype of the plant.