In Drosophila melanogaster, what percentage of recombination is shown between the genes white and yellow, and what percentage of linkage is shown between the genes white and miniature wing, respectively?

Options

A. 98.7% and 62.8 %
B. 1.3 % and 37.2%
C. 1.3 % and 62.8%
D. 98.7% and 37.2%

Answer

To solve the question regarding the percentage of recombination between the genes white and yellow, and the percentage of linkage between the genes white and miniature wing in Drosophila melanogaster, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Linkage and Recombination**:
- Linkage refers to the tendency of genes located close to each other on a chromosome to be inherited together. The closer the genes are, the stronger the linkage.
- Recombination occurs during meiosis when homologous chromosomes exchange genetic material, leading to new combinations of alleles. The percentage of recombination can give us an idea of how far apart two genes are on a chromosome.

2. **Analyzing the Genes**:
- We need to determine the linkage percentage between the genes white and yellow, and white and miniature wing.
- The problem states that the distance between the genes white and yellow is relatively large, indicating a low linkage percentage.

3. **Calculating Recombination Percentage**:
- For the genes white and yellow, the estimated percentage of recombination is given as **1.3%**. This indicates that these genes are relatively far apart on the chromosome.

4. **Calculating Linkage Percentage**:
- For the genes white and miniature wing, the linkage percentage is higher due to their closer proximity on the chromosome. The estimated linkage percentage is **62%**.

5. **Summarizing the Results**:
- Therefore, the percentage of recombination between the genes white and yellow is **1.3%**, and the percentage of linkage between the genes white and miniature wing is **62%**.

### Final Answer:
- Recombination percentage between white and yellow: **1.3%**
- Linkage percentage between white and miniature wing: **62%**