A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?

Options

A. AABB
B. AaBb
C. AaBB
D. AABb

Answer

To determine the corresponding genotype of a human male who produces sperm with the genotypes AB, Ab, aB, and ab, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Gametes**: The male produces four types of gametes: AB, Ab, aB, and ab. This indicates that he has two traits, each represented by two alleles (A/a and B/b).

2. **Identifying Alleles**: The gametes can be broken down into their respective alleles:
- AB: A (dominant) and B (dominant)
- Ab: A (dominant) and b (recessive)
- aB: a (recessive) and B (dominant)
- ab: a (recessive) and b (recessive)

3. **Determining the Genotype**:
- Since the gametes AB and Ab contain the dominant allele A, the individual must have at least one dominant A allele.
- The presence of gametes aB and ab indicates that the individual must also have the recessive allele a.
- Therefore, the individual must be heterozygous for the A gene (genotype Aa).
- For the B gene, the presence of both B and b alleles in the gametes indicates that the individual must also be heterozygous for the B gene (genotype Bb).

4. **Combining the Genotypes**:
- The overall genotype of the individual must be AaBb, as he has one dominant and one recessive allele for both traits.

### Final Answer:
The corresponding genotype of this person is **AaBb**.

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