I the cell of n organism heterozygous for two pairs of genes represented by Aa, Bb, undergoes meiosis, then the possible genotypic combination of gametes will be :-

Options

A. AB, Ab, aB, ab
B. AB, ab
C. Aa, Bb
D. A, a, B, b

Answer

To solve the problem of finding the possible genotypic combinations of gametes from an organism that is heterozygous for two pairs of genes (AaBb), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Genotype**: The organism is heterozygous for two pairs of genes, represented as Aa and Bb. This means it has one dominant and one recessive allele for each gene.

2. **Identify Alleles**: The alleles for the first gene (A) are A (dominant) and a (recessive). The alleles for the second gene (B) are B (dominant) and b (recessive).

3. **Determine Gamete Formation**: During meiosis, the alleles segregate independently. Each gamete will receive one allele from each gene pair.

4. **List Possible Combinations**:
- From the first gene (Aa), the possible alleles are A and a.
- From the second gene (Bb), the possible alleles are B and b.
- Therefore, we can combine these alleles to form the following gametes:
- AB (A from Aa and B from Bb)
- Ab (A from Aa and b from Bb)
- aB (a from Aa and B from Bb)
- ab (a from Aa and b from Bb)

5. **Final List of Gametes**: The possible genotypic combinations of gametes produced by the organism heterozygous for the two pairs of genes (AaBb) are:
- AB
- Ab
- aB
- ab

### Conclusion:
The possible genotypic combinations of gametes from an organism with the genotype AaBb are: **AB, Ab, aB, ab**.