Mitosis/meiosis and fertilization are two important processes involved in sexual reproduction in angiosperms which collectively maintain the chromosome number constant from generation to generation.

Explanation

### Step-by-Step Text Solution:

1. **Understanding Mitosis and Meiosis**:
- Mitosis is a type of cell division that results in two identical daughter cells, maintaining the same chromosome number as the parent cell. It is primarily involved in growth, repair, and asexual reproduction.
- Meiosis, on the other hand, is a specialized form of cell division that reduces the chromosome number by half, producing four non-identical haploid gametes (sperm and egg cells in angiosperms).

2. **Role of Meiosis in Sexual Reproduction**:
- In angiosperms, meiosis occurs in the reproductive organs, leading to the formation of haploid gametes. In males, this results in the production of sperm, and in females, it results in the production of eggs. Each gamete contains half the number of chromosomes compared to the diploid parent cell.
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