RrYy yields gamete types

Options

A. One
B. Two
C. Three
D. Four

Answer

To determine the gamete types produced by the genotype RrYy, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotype**: The given genotype is RrYy. This means that there are two genes being considered: one for the trait represented by 'R' (dominant) and 'r' (recessive), and another for the trait represented by 'Y' (dominant) and 'y' (recessive).

2. **Understand Allele Combinations**: Each gene can assort independently during gamete formation. This means that the alleles for one gene do not affect the alleles for the other gene.

3. **Determine Possible Alleles**:
- For the first gene (Rr), the possible alleles are:
- R (dominant)
- r (recessive)
- For the second gene (Yy), the possible alleles are:
- Y (dominant)
- y (recessive)

4. **Combine Alleles to Form Gametes**: Since each gamete will contain one allele from each gene, we can combine the alleles:
- Combine R with Y → RY
- Combine R with y → Ry
- Combine r with Y → rY
- Combine r with y → ry

5. **List All Gametes**: The gametes formed from the combinations above are:
- RY
- Ry
- rY
- ry

6. **Count the Number of Gametes**: There are a total of 4 different gametes that can be formed from the genotype RrYy.

### Final Answer:
The gamete types yielded by the genotype RrYy are: RY, Ry, rY, and ry. Therefore, the answer is 4 gamete types.

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