Mitosis
- Created by: kieranspro
- Created on: 29-01-19 17:13
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- Mitosis
- Interphase
- The cell carries out normal functions and prepares to divide
- The cells DNA is unravelled and replicated
- Organelles are also replicated so the cell has spare ones
- The cells ATP content increases as ATP provides the energy needed for cell division
- The cell carries out normal functions and prepares to divide
- Stage 1: Prophase
- The chromosones condense, becoming shorter and fatter
- Tiny bundles of protein, centrioles, start to move to opposite ends of the cell
- The moving centrioles cretaes a network of protein fibres across it known as spindle fibres
- The nuclear envelope breaks down and the chromosones lie free in the cytoplasm
- The chromosones condense, becoming shorter and fatter
- Stage 2: Metaphase
- The chromosones consist of two sister chromatids
- They chromatids line up along the middle of the cell
- The sister chromatids attacht too two opposite spindle fibres by their centromere
- The chromosones consist of two sister chromatids
- Stage 3: Anaphase
- The centromere splits, seperating each pair of sister chromatids
- The spindle fibres contract, pulling the chromatids to opposite poles of the spindle
- This is done centromere first with the chromatid behind it, appearing v-shaped
- The centromere splits, seperating each pair of sister chromatids
- Stage 4: Telophase
- The chromatids reach the opposite poles of the spindle
- They uncoil becoming long and thin again, now called chromosones
- A nuclear envelope forms around each grup of chromosones,forming two nuclei
- The chromatids reach the opposite poles of the spindle
- Stage 5: Cytokenesis
- The cytoplasm divides
- There are now two identical daughter cells
- The cytoplasm divides
- Interphase
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