In Drosophila crossing over occurs in female but not in male. Gene A and B are 10 map unit apart on chromosome. A female Drosophila with genotype `(AB)/(ab).` and male Drosophila with genotype `(AB)/(ab).` How many type of gametes are produced by female and male Drosophila respectively

Options

A. `{:(4,"types",:,2,"types"):}`
B. `{:(2,"types",:,2,"types"):}`
C. `{:(4,"types",:,4,"types"):}`
D. `{:(4,"types",:,"one","types"):}`

Answer

To solve the problem, we need to determine the number of gametes produced by both female and male Drosophila given their genotypes and the information about crossing over.

### Step-by-Step Solution:

1. **Understand the Genotypes**:
- Female Drosophila: `(AB)/(ab)`
- Male Drosophila: `(AB)/(ab)`

2. **Crossing Over in Drosophila**:
- In Drosophila, crossing over occurs in females but not in males. This means that the female can produce recombinant gametes, while the male will only produce parental gametes.

3. **Determine Gametes from Female**:
- The female has the genotype `(AB)/(ab)`.
- The possible gametes produced by the female due to crossing over can be:
- Parental gametes: `AB` and `ab`
- Recombinant gametes due to crossing over: `Ab` and `aB`
- Therefore, the female can produce a total of **4 types of gametes**: `AB`, `ab`, `Ab`, and `aB`.

4. **Determine Gametes from Male**:
- The male has the genotype `(AB)/(ab)`.
- Since crossing over does not occur in males, the male can only produce the parental gametes:
- `AB` and `ab`
- Therefore, the male can produce a total of **2 types of gametes**: `AB` and `ab`.

5. **Final Answer**:
- The number of gametes produced by the female Drosophila is **4**.
- The number of gametes produced by the male Drosophila is **2**.

### Summary:
- Female Drosophila produces **4 types of gametes**.
- Male Drosophila produces **2 types of gametes**.

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