Describe the post-fertilization changes in a flower.

Explanation

### Step-by-Step Solution for Post-Fertilization Changes in a Flower:

1. **Fertilization Process**:
- Fertilization occurs when the male gamete (sperm) fuses with the female gamete (egg) to form a zygote. This zygote is a diploid cell, meaning it contains two sets of chromosomes, one from each parent.

**Hint**: Remember that fertilization is the fusion of gametes leading to the formation of a zygote.

2. **Zygote Development**:
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