Wheat kernel color is an additive trait controlled by two genes, gene A and gene B. The A1 and B1 alleles add 1 unit of color to the kernels. The A2 and B2 alleles add 0 units of color to the kernels.   Question 1: If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2B2 individual, which of the following phenotypes are possible? a. 0 units (white) b. 1 unit (light pink) c. 2 units (dark pink) d. 3 units (light red) e. 4 units (dark red)   Question 2: If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2B2 individual, what is your expected phenotypic ratio? a. 1:2:1 b. 1:1:1:1 c. 9:3:3:1 d. 3:1

Human Heredity: Principles and Issues (MindTap Course List)
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Author:Michael Cummings
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Chapter5: The Inheritance Of Complex Traits
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Wheat kernel color is an additive trait controlled by two genes, gene A and gene B. The A1 and B1 alleles add 1 unit of color to the kernels. The A2 and B2 alleles add 0 units of color to the kernels.
 
Question 1:
If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2Bindividual, which of the following phenotypes are possible?
a. 0 units (white)
b. 1 unit (light pink)
c. 2 units (dark pink)
d. 3 units (light red)
e. 4 units (dark red)
 
Question 2:
If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2Bindividual, what is your expected phenotypic ratio?
a. 1:2:1
b. 1:1:1:1
c. 9:3:3:1
d. 3:1
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