Sexual reproduction requires which of the following?

Options

A. Meiosis
B. Amitosis
C. Gamete formation
D. Fertilisation

Explanation

**Step-by-Step Solution:**

1. **Understanding Sexual Reproduction**: Sexual reproduction involves the combination of genetic material from two parents to produce offspring. This process requires specific biological mechanisms.

2. **Key Processes in Sexual Reproduction**:
- **Meiosis**: This is the type of cell division that reduces the chromosome number by half, resulting in the formation of gametes (sperm and eggs). It is essential for producing haploid cells from a diploid parent cell.
- **Gamete Formation**: The process of forming gametes (sperm and eggs) is crucial. These are the reproductive cells that will unite during fertilization.
- **Fertilization**: This is the fusion of male and female gametes (sperm and egg) to form a zygote, which is the first cell of the new organism.

3. **Conclusion**: Therefore, sexual reproduction requires:
- Meiosis (to produce gametes)
- Gamete formation (the actual creation of sperm and eggs)
- Fertilization (the fusion of gametes)

4. **Answer Selection**: Based on the processes identified, the correct options that are required for sexual reproduction are:
- Option 1: Meiosis
- Option 3: Gamete formation
- Option 4: Fertilization

**Final Answer**: The answer to the question is Option 1, 3, and 4.

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