Recombination process occur between ..................

Options

A. Non sister chromatids of Homologous chromosomes
B. Sister chromatid of Homologous chromosome
C. Sister chromatids of non homologous chromosomes
D. Non sister chromatids of Non homologous chromosomes

Answer

**Step-by-Step Solution:**

1. **Understanding Recombination**: Recombination is a genetic process that involves the exchange of genetic material between chromosomes. This process is crucial for genetic diversity.

2. **Identifying the Type of Recombination**: The specific type of recombination we are discussing here is called "crossing over," which occurs during meiosis.

3. **Meiosis Overview**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the formation of gametes (sperm and eggs). It consists of two rounds of division: meiosis I and meiosis II.

4. **Phase of Meiosis**: The crossing over occurs during prophase I of meiosis. During this phase, homologous chromosomes pair up and exchange segments.

5. **Chromosome Structure**: Each chromosome is made up of two identical strands called sister chromatids, which are formed after DNA replication.

6. **Non-Sister Chromatids**: The crossing over specifically occurs between non-sister chromatids. Non-sister chromatids are the chromatids of homologous chromosomes (chromosomes that are similar in shape, size, and genetic content but originate from different parents).

7. **Formation of Recombinant Chromosomes**: After the exchange of segments between non-sister chromatids, new combinations of alleles are formed, resulting in recombinant chromosomes.

8. **Conclusion**: Therefore, the recombination process occurs between non-sister chromatids of homologous chromosomes.

**Final Answer**: The recombination process occurs between non-sister chromatids of homologous chromosomes.

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