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Which of the following represents the correct phenotypic ratio of a monohybrid cross exhibiting codominance in the F2 generation?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: B —
Solution
- In codominance, both alleles are expressed in the heterozygote.
- Across of heterozygotes () yields genotypes $1 AA : 2 Aa : 1 aa$.
- Since , , and all have distinct phenotypes, the ratio is .
- Hence the answer is (B).
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