Mitosis Cell Division Cell division All complex organisms

Mitosis Cell Division

Cell division All complex organisms originated from a single fertilized egg. Every cell in your body started here, through cell division the numbers are increased Cells then specialize and change into their various roles

Mitosis • Mitosis is the process by which new body cells are produced for: – Growth – Replacing damaged or old cells.

Parent cell Chromosomes are copied and double in number Chromosomes now split 2 daughter cells identical to original

Mitosis • All daughter cells contain the same genetic information from the original parent cell from which it was copied. • Every different type cell in your body contains the same genes, but only some act to make the cells specialize – e. g. into nerve or muscle tissue.

Steps of Mitosis Interphase • Cells grows to full size • Cell makes a copy of DNA

Prophase • • Chromosomes, centrioles and spindle fibers form Nuclear membrane breaks down

Metaphase • • Chromosomes line-up in center of cell Centromeres attach to spindle fibers

Anaphase • Centromers split • Chromatids separate and move to oposite ends

Telophase • New nuclear membrane forms around chromosomes

Cytokinesis • • Cell pinches in two Each new cell has same number of chromosomes

Mitosis – bone cell slides 1 2 Chromosomes copied Parent cell 3 Copies separating Cells split 4 5 2 daughter cells

Plants apical meristem

Rat – epithelial cells