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Mitosis: Cell Division

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Mitosis: Cell Division. Cell Division - process by which a cell splits into two identical daughter cells Occurs in two main phase: . Interphase – cell copies DNA and prepares for division Mitosis – chromosomes separate into two new cells. What are chromosomes?.

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Presentation Transcript
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Cell Division - process by which a cell splits into two identical daughter cells

Occurs in two main phase: 

Interphase – cell copies DNA and prepares for division

Mitosis – chromosomes separate into two new cells

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What are chromosomes?
  • DNA containing cell’s genetic code
  • Each chromosome has a matching pair (homologous)
  • During interphase, each chromosome copies itself
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Life Cycle of the Cell
  • Mitosis = nuclear division
  • Mitosis is followed by cytokinesis (cell division)
  • The steps of mitosis ensure that each new cell has the exact same number of chromosomes as the original
  • Interphase = growth phase, differentiation occurs
the cell cycle
The Cell Cycle

Interphase  (longest phase)

G1 - first growth (gap) phase

Synthesis - DNA makes a copy

G2 - second growth (gap) phase, preparing for mitosis

Mitosis - nucleus divides, ensuring each new cell has the exact number of chromosomes as parent

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1. chromosomes visible (chromatids)

2. centrioles migrate to the poles

3. nuclear membrane disappears

4. nucleolus disappears

5. spindle forms

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1. chromosomes disappear • chromatin

2. nuclear membrane reforms

3. nucleoli reappears

4. spindle disappears

5. centrioles duplicate

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- division of the cytoplasm to form 2 new daughter cells

- organelles are divided

- daughter cells are genetically identical

Cells return to interphase

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Name the phase
  • Identify X
  • Identify Y
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