B16.2 Cell division

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Last updated 8:39 PM on 6/5/26
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6 Terms

1
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What is mitosis?

  • Nuclear division which gives rise to genetically identical cells

2
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State the process of mitosis

  • Each chromosome is duplicated (before mitosis begins) so there are exactly 2 pairs of each chromosome when the cell is about to divide

  • When the nucleus divides into two, one copy of each chromosome goes to each daughter cell, maintaining the same number of chromosomes as the original cell

  • Daughter cells are diploid

  • Only one cell division occurs

<ul><li><p>Each chromosome is duplicated (before mitosis begins) so there are exactly 2 pairs of each chromosome when the cell is about to divide</p></li><li><p>When the nucleus divides into two, one copy of each chromosome goes to each daughter cell, maintaining the same number of chromosomes as the original cell</p></li><li><p>Daughter cells are diploid</p></li><li><p>Only one cell division occurs</p></li></ul><p></p>
3
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What is mitosis used for?

  • Growth

  • Repair of damaged tissues

  • Replacement of cells

  • Asexual reproduction

4
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What is meiosis?

  • Nuclear division which gives rise to genetically different cells

5
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State the process of meiosis

  • Each chromosome is duplicated (before meiosis begins)

  • Number of chromosomes are halved (reduction division) to ensure there is not double the amount when gametes join during fertilisation, each cell will have one chromosome of each pair

  • These cells will be genetically different

  • Diploid cells become four haploid daughter cells

  • Two cell division occurs

<ul><li><p>Each chromosome is duplicated (before meiosis begins)</p></li><li><p>Number of chromosomes are halved (reduction division) to ensure there is not double the amount when gametes join during fertilisation, each cell will have one chromosome of each pair</p></li><li><p>These cells will be genetically different</p></li><li><p>Diploid cells become four haploid daughter cells</p></li><li><p>Two cell division occurs</p></li></ul><p></p>
6
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What is meiosis used for?

  • Production of gametes