Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were yellow. When these progeny were intercrossed, they produced an F2 consisting of 121 yellow, 9 black and 30 chocolate. What epistatic ratio and what kind of epistasis is approximated in the F2? Propose a biochemical pathway for coat color in Labrador retrievers based on the type of epistasis. Correlate each genotype with the phenotype that would occur in your pathway. Also show the frequency of each genotype. A-B- A-bb aaB- aabb
Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were yellow. When these progeny were intercrossed, they produced an F2 consisting of 121 yellow, 9 black and 30 chocolate. What epistatic ratio and what kind of epistasis is approximated in the F2? Propose a biochemical pathway for coat color in Labrador retrievers based on the type of epistasis. Correlate each genotype with the phenotype that would occur in your pathway. Also show the frequency of each genotype. A-B- A-bb aaB- aabb
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter15: Genomes And Genomics
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Problem 1QP: The gene controlling ABO blood type and the gene underlying nail-patella syndrome are said to show...
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Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were yellow. When these progeny were intercrossed, they produced an F2 consisting of 121 yellow, 9 black and 30 chocolate.
What epistatic ratio and what kind of epistasis is approximated in the F2?
Propose a biochemical pathway for coat color in Labrador retrievers based on the type of epistasis.
Correlate each genotype with the
A-B-
A-bb aaB- aabb
Expert Solution
Introduction:-
- Black Yellow All Yellow (F1)
- F1F2121 Yellow 9 Black 30 Chocolate
- Total offspring in F2 (121930) 160
- Corresponding Ratios:-
Yellow 0.76
Black 0.06
Chocolate 0.19
- Now, Dividing each by frequency of lowest phenotype, i.e. Black 0.06 we get:-
Yellow 12.6 12
Black 11
Chocolate 3.163
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