Meiosis in diploid organisms results in

Options

A. production of gametes
B. reduction in the number of chromosomes
C. introduction of variation
D. all of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Meiosis**: Meiosis is a type of cell division that occurs in diploid organisms, which have two sets of chromosomes. It is known as a reduction division because it reduces the chromosome number by half.

2. **Production of Gametes**: The primary function of meiosis is to produce gametes (sperm and eggs in animals). During meiosis, a diploid germ cell undergoes two rounds of division to form four haploid gametes.

3. **Reduction in Chromosome Number**: In diploid organisms, meiosis results in the reduction of the chromosome number from diploid (2n) to haploid (n). For example, in humans, the diploid number is 46, and after meiosis, the gametes will have 23 chromosomes.

4. **Introduction of Variations**: Meiosis also introduces genetic variation among the gametes. This occurs through processes such as crossing over during prophase I, where homologous chromosomes exchange genetic material, leading to new combinations of genes.

5. **Conclusion**: Therefore, meiosis in diploid organisms results in:
- Production of gametes
- Reduction in the number of chromosomes
- Introduction of variations

Since all three statements are correct, the answer is "all of the above."

**Final Answer**: Meiosis in diploid organisms results in the production of gametes, reduction in the number of chromosomes, and introduction of variations (all of the above).

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