Dihybrid Worksheet KEY

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Dihybrid Worksheet KEY
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• 1. Genotype Practice In bunnies, black is
  dominant to white. Rough is dominant to smooth.
• Give the genotype for each of the following
• a. Homozygous black, smooth bunny BBrr
• b. Heterozygous black-rough bunny BbRr
• c. White, homozygous rough bunny bbRR
• d. White, smooth bunny bbrr
• e. Homozygous black-rough bunny BBRR
• f. White, heterozygous rough bunny bbRr

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• 2. Gamete Combination Practice. Give the gamete
  combination for each genotype.
• a. AATt AT, At, AT, At
• b. AaTT AT, AT, aT, aT
• c. aatt at, at, at, at, at
• d. AAtt At, At, At, At

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Final answer 9 Black-Rough 3 Black-Smooth 3
White-Rough 1 White-Smooth
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Final answer 1 BBRR 2 BBRr 1 BBrr 2 BbRR
4 BbRr 2 Bbrr 1 bbRR 2 bbRr 1 bbrr
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a. AATT x aatt b. Punnett Square c. Axial and
Tall d. AaTt f. Punnett Square e. Phenotype
ratio 9 Axial-Tall 3 Axial-Short 3
Terminal-Tall 1 Terminal-Short g. Genotype
ratio 1 AATT 2 AATt 1 AAtt 2 AaTT 4
AaTt 2 Aatt 1 aaTT 2 aaTt 1 aatt
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