Which of the following gametes are produced by individual with genotype AaBb?

Options

A. Aa, Bb
B. AB, ab
C. AB, Ab , Ab, ab
D. AB, Aa, Bb, ab

Answer

To determine the gametes produced by an individual with the genotype AaBb, we can follow these steps:

### Step 1: Understand the Genotype
The genotype AaBb consists of two gene pairs:
- The first gene pair is A (dominant) and a (recessive).
- The second gene pair is B (dominant) and b (recessive).

### Step 2: Identify Possible Alleles
For each gene, the individual can contribute one of the two alleles:
- For gene A, the alleles are A and a.
- For gene B, the alleles are B and b.

### Step 3: Use the FOIL Method
To find all possible combinations of alleles in the gametes, we can use the FOIL method (First, Outside, Inside, Last):
- **First**: Combine the first alleles from each gene (A from A and B from B) → AB
- **Outside**: Combine the first allele from the first gene and the second allele from the second gene (A from A and b from b) → Ab
- **Inside**: Combine the second allele from the first gene and the first allele from the second gene (a from a and B from B) → aB
- **Last**: Combine the second alleles from each gene (a from a and b from b) → ab

### Step 4: List All Possible Gametes
From the combinations above, we can list the possible gametes:
1. AB
2. Ab
3. aB
4. ab

### Conclusion
The individual with genotype AaBb can produce four types of gametes: AB, Ab, aB, and ab.

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