Q. The genes for the eye colour and size of the wing in Drosophila are located on the same chromosome.They can be separated Recombinants develop due to

Options

A. a) Non disjunction
B. b) Crossing over
C. c) Hybridization
D. d) Not be separted at any stage

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question states that the genes for eye color and wing size in Drosophila (fruit flies) are located on the same chromosome but can be separated. We need to determine the mechanism that allows for this separation.

2. **Identify the Mechanisms of Genetic Variation**: In genetics, genes located on the same chromosome can be inherited together, a phenomenon known as linkage. However, they can also be separated through specific processes.

3. **Consider the Options**:
- **Option A: Non-disjunction** - This refers to the failure of chromosome pairs to separate properly during cell division, leading to gametes with abnormal numbers of chromosomes. This does not directly cause separation of linked genes.
- **Option B: Crossing Over** - This is a process that occurs during meiosis where homologous chromosomes exchange segments of genetic material. This can result in new combinations of alleles, effectively separating linked genes.
- **Option C: Hybridization** - This generally refers to the mating of two different species or varieties, which is not applicable in this context.
- **Option D: Not be separated at any stage** - This is incorrect as the question states that the genes can be separated.

4. **Evaluate the Correct Answer**: Since the genes for eye color and wing size are on the same chromosome but can be separated, the only viable mechanism is crossing over. This occurs when homologous chromosomes exchange genetic material during meiosis, leading to recombinant offspring.

5. **Conclusion**: The correct answer is **Option B: Crossing Over**.

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