mitosis

• context of mitosis

  • how our bodies grow and heal through making identical cells
  • eg. making new skin cells after a cut
  • undergoes equational division
• interphase - occurs BEFORE mitosis

  • where cells spend most of their life
  • ie. growing, DNA replication, daily cell functions

  A) mitosis

  
• chromosome replication

  • before mitosis, there needs to be double the amount of DNA since there are going to be 2 cells produced from 1, hence requiring 92 chromatids.

  A) proteins

  B) DNA

  C) 92

  D) 46

  
• stages of division in mitosis

  • PMAT
  • prophase: nucleus is still there, chromosomes are condensing
  • metaphase: nucleus not there, chromosomes align at centre of cell, spindle fibres attach to centromeres
  • anaphase: centromeres split and sister chromatids are pulled to opposite sides, ensures each daughter cell gets same set of chromosomes
  • telophase: the separated chromatids are on opposite sides of cell, new neuclei have formed on both sides
  • cytokinesis: actual splitting of cell (cytoplasm splits)

  A) condensing

  B) spindles