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I the cell of n organism heterozygous fo...

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 :-

A

AB, Ab, aB, ab

B

AB, ab

C

Aa, Bb

D

A, a, B, b

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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**.
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Knowledge Check

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