Cell Division
The Cell division topic and the stages of it.
- Created by: Bertimo
- Created on: 25-02-14 19:26
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- Cell Division
- Cell Cycle (I Prefer Men And Tea)
- Interpahse
- Oganelles divide for the new cell
- The stage most cells are in
- The cell increases in size
- DNA is replicated
- Each chromosome consists of a pair of chromotids
- Prophase
- Chromosomes shorten and thicken by spiralisation
- Centrioles move to the opposite poles of the cell
- mircotubules radiate from the centrioles
- Nuclear membrane disintergrates
- Metaphase
- Chromosomes line up in single file at the equator of the cell
- Chromosomes become attached to the spindle fibers by their centromeres
- Anaphase
- This is the fastest stage
- The centromeres split in two so chromotids are seperated
- The spindle fibers pull the daugheter centromeres to opposite poles
- Telophase
- Chromosomes reach the opposite poles of the cell, uncoil and lengthen
- Spindle fibers desintergrate
- Nuclear membrane reforms and leads to cytokinesis
- Produces genitally identical daughter cells (Diploid)
- Interpahse
- Definistions
- Chromosome - Contains one est of genetic information
- Chromotid - Half of a double chromosome, bound by a centromere
- Centormere - The part of the replicated chromosome, holding the two chromotids together
- Extra Information
- Mitosis is for growth, cell replacement, regeneration and asexual reporduction
- Meosis
- The cell divides twice, not once
- Used to make gametes
- Produces 4 daughter cells, with half the genetic material to maintain genetic stability
- Produces haploid cells
- DNA Replication
- First DNA helicase 'unzips' the two DNA strands, exposing the bases
- Next DNA polymerase moves along the exposed bases and creates a new complementary strand as it goes
- Then BAM you have two strands of DNA!
- Cell Cycle (I Prefer Men And Tea)
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