In a species of plant, two genes control flower color. The red allele (R) is dom
ID: 53599 • Letter: I
Question
In a species of plant, two genes control flower color. The red allele (R) is dominant to the white allele (r); the color producing allele (C) is dominant to the non color producing allele (c). You suspect that either an rr homozygote or a cc homozygote will produce white flowers. In other words, rr is epistatic to C, and cc is epistatic to R. to test your hypothesis, you allowed heterozygous plants (RrCc) to self fertilize and count the offspring. You obtained the following data:201 plants with red flowers and 144 with white flowers. Conduct a chi square analysis to see if your observed data are consistent with your hypothesis.
Explanation / Answer
red and white showes incomplete dominance
In F1 Generation we get all pink colour
In F2 Generation we get 1 red 2 pink 1 white
The pheotypic ratio is 1:2:1
Codominance
•Two alleles affect the phenotype in separate and distinguishable ways.
•Neither allele can mask the other and both are expressed in the offspring and not in an “intermediate” form.
•Example: red flowers that are crossed with white flowers that yield red and white flowers.