You are given a pea that produces round, yellow seeds (both dominant traits), but its genotype is unknown. You conduct a testcross to determine the genotype at both loci, and find that the offspring have the following ratios of phenotypes: % round, yellow, % round, green, % wrinkled, yellow, % wrinkled, green 1. What are all the possible genotypes of a round, yellow pea? Assume shape is controlled by the R locus, and color is controlled by the Y locus. 2. Break this down to the single gene level by answering the following questions: a. What is the proportion of round to wrinkled offspring? b. What is the proportion of yellow to green offspring?

Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter8: Patterns Of Inheritance
Section: Chapter Questions
Problem 2ACQ: Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are...
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You are given a pea that produces round, yellow seeds (both dominant traits), but its genotype is
unknown. You conduct a testcross to determine the genotype at both loci, and find that the offspring
have the following ratios of phenotypes:
% round, yellow, % round, green, ¼ wrinkled, yellow, % wrinkled, green
1. What are all the possible genotypes of a round, yellow pea? Assume shape is controlled by the R
locus, and color is controlled by the Y locus.
2. Break this down to the single gene level by answering the following questions:
a. What is the proportion of round to wrinkled offspring?
b. What is the proportion of yellow to green offspring?
Transcribed Image Text:You are given a pea that produces round, yellow seeds (both dominant traits), but its genotype is unknown. You conduct a testcross to determine the genotype at both loci, and find that the offspring have the following ratios of phenotypes: % round, yellow, % round, green, ¼ wrinkled, yellow, % wrinkled, green 1. What are all the possible genotypes of a round, yellow pea? Assume shape is controlled by the R locus, and color is controlled by the Y locus. 2. Break this down to the single gene level by answering the following questions: a. What is the proportion of round to wrinkled offspring? b. What is the proportion of yellow to green offspring?
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