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Meiosis process and genetic variation
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Meiosis: Specialized cell division producing gametes (sex cells)
Key features:
Chromosome numbers:
Interphase: DNA replicates (same as mitosis)
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| Section | Format | Questions | Time | Weight | Calculator |
|---|---|---|---|---|---|
| Multiple Choice | MCQ | 60 | 90 min | 50% | ๐ซ |
| Free Response (Long) | FRQ | 2 | 50 min | 30% | ๐ซ |
| Free Response (Short) | FRQ | 4 | 40 min | 20% | ๐ซ |
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Similar to mitosis but with haploid cells
| Feature | Mitosis | Meiosis |
|---|---|---|
| Purpose | Growth, repair | Gamete production |
| Divisions | One | Two |
| Daughter cells | 2 diploid | 4 haploid |
| Genetic identity | Identical to parent | Different from parent |
| Crossing over | No | Yes (Prophase I) |
| Homolog pairing | No | Yes (synapsis) |
Nondisjunction: Homologs or sister chromatids fail to separate
Results:
Examples: