Which process is responsible for the maintenance of a fixed number of chromosomes generation to generation for each species having diploid set of chromosomes ?

Explanation

To answer the question regarding which process is responsible for the maintenance of a fixed number of chromosomes from generation to generation in species with a diploid set of chromosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome Number**:
- Each species has a specific number of chromosomes that are maintained across generations. In humans, for instance, the diploid number is 46 chromosomes (2n = 46).

2. **Role of Sexual Reproduction**:
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