How does an embryo form?

Explanation

**Step-by-Step Text Solution:**

1. **Fertilization**: The process of embryo formation begins with fertilization, where a sperm cell from the male fuses with an egg cell from the female to form a single cell called a zygote.

2. **Zygote Division**: After fertilization, the zygote undergoes a series of divisions through a process called mitosis. This division is crucial as it leads to the formation of multiple cells.

3. **Formation of Cell Ball**: As the zygote divides, it forms a cluster of cells, often referred to as a "cell ball" or morula. This is the initial stage of development.

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