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QuestionBiology

Describe the differences between meiosis and mitosis.
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Answer

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Step 1:
I'll solve this problem by comparing meiosis and mitosis across several key characteristics:

Step 2:
: Cell Division Purpose

- Mitosis: Creates genetically identical daughter cells for growth, repair, and asexual reproduction - Meiosis: Produces genetically unique reproductive cells (gametes) for sexual reproduction

Step 3:
: Number of Daughter Cells

- Mitosis: Produces $$2$$ genetically identical daughter cells
- Meiosis: Produces 4 genetically unique haploid cells

Step 4:
: Chromosome Number

- Mitosis: Maintains the same chromosome number as the parent cell (diploid) - Meiosis: Reduces chromosome number by half (from diploid to haploid)

Step 5:
: Genetic Variation

- Mitosis: No genetic recombination occurs - Meiosis: Includes genetic recombination through:

Step 6:

Crossing over

Step 7:

Independent chromosome assortment

Step 8:

Random chromosome segregation

Step 9:
: Occurrence in Organisms

- Mitosis: Occurs in somatic (body) cells of all multicellular organisms - Meiosis: Occurs only in reproductive cells of sexually reproducing organisms

Final Answer

Meiosis and mitosis differ fundamentally in purpose, cell production, chromosome number, and genetic variation, with mitosis supporting growth and repair, while meiosis supports sexual reproduction and genetic diversity.