Mitosis
Introduced| English | Meaning |
|---|---|
| mitosis/maɪˈtəʊsɪs/ | Nuclear division that produces two genetically identical nuclei with the same chromosome number as the original nucleus. |
| daughter cells/ˈdɔːtə selz/ | daughter cells |
| meiosis/meɪˈəʊsɪs/ | A type of nuclear division that produces haploid nuclei with half the original chromosome number and creates genetic variation. |
Making identical copies
- To grow and repair itself, your body must make new cells that are exact copies.
- This copying division is mitosis 有丝分裂.
Mitosis produces daughter cells that are:
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Mitosis makes identical copies.
After mitosis, each daughter cell has:
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The number stays the same (46 in humans).
Cell division that produces two identical cells for growth and repair is ______.
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Mitosis keeps the chromosome number the same.
What mitosis is
- Mitosis produces two genetically identical daughter cells 子细胞 from one parent cell.
- Each has the same number of chromosomes as the parent (46 in humans).
Mitosis makes two identical diploid cells; meiosis 减数分裂 makes four different haploid gametes
Mitosis
Mitosis makes two genetically identical cells — for growth, repair and asexual reproduction.
Mitosis is used for: (Select all that apply.)
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Gametes are made by meiosis, not mitosis.
Why it matters
- Mitosis is used for growth, repair of damaged tissue, and asexual reproduction.
- Because the cells are identical, the new tissue matches the old.
Before mitosis, the cell copies all its chromosomes.
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The copies are then shared equally.
The key idea
- Before dividing, the cell copies all its chromosomes.
- The copies are shared equally, so each daughter cell gets a full, identical set.
Mitosis keeps the chromosome number the same. Both daughter cells get the full 46. This is different from meiosis, which halves the number to make gametes.
You've got it
- mitosis makes two genetically identical daughter cells
- each has the same chromosome number as the parent (46 in humans)
- it is used for growth, repair and asexual reproduction