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Question
Draw a Punnett square showing the gametes, phenotype and genotype ratios.
Long Answer
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Solution
| Gametes |
AR | Ar | aR | ar |
|---|---|---|---|---|
| AR | AARR (Axial Round) |
AARr (Axial Round) |
AaRR (Axial Round) |
AaRr (Axial Round) |
| Ar | AARr (Axial Round) |
AArr (Axial Wrinkled) |
AaRr (Axial Round) |
Aarr (Axial Wrinkled) |
| aR | AaRR (Axial Round) |
AaRr (Axial Round) |
aaRR (Terminal Round) |
aaRr (Terminal Round) |
| ar | AaRr (Axial Round) |
Aarr (Axial Wrinkled) |
aaRr (Terminal Round) |
aarr (Terminal Wrinkled) |
The phenotypic ratio obtained from this dihybrid cross is 9 Axial Round : 3 Axial Wrinkled : 3 Terminal Round : 1 Terminal Wrinkled.
The corresponding genotypic ratio for the offspring is 1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1.
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Notes
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