QQuestionBiology
QuestionBiology
Which statement describes a key difference 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 systematically:
Step 2:: Understanding Cell Division Types
Meiosis and mitosis are both types of cell division, but they have critical differences: - Mitosis occurs in somatic (body) cells - Meiosis occurs in reproductive (sex) cells
Step 3:: Key Chromosome Behavior Difference
- $$2n \rightarrow n
In mitosis: - Produces two genetically identical daughter cells - Chromosome number remains the same In meiosis: - Produces four genetically unique daughter cells - Chromosome number is reduced by half
Step 4:: Genetic Variation
- Mitosis: No genetic recombination - Meiosis: Includes genetic recombination through:
Step 5:
Crossing over
Step 6:
Independent chromosome assortment
Step 7:: Purpose
- Mitosis: Growth, repair, asexual reproduction - Meiosis: Sexual reproduction, gamete formation
Final Answer
A key difference between meiosis and mitosis is that meiosis reduces chromosome number by half and produces genetically unique cells through recombination, while mitosis maintains chromosome number and produces genetically identical cells.
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