producing new cells and reproduction

• mitosis 1. chromosome makes a replica of itself 2. chromosomes line up at equator 3. spindle fibres pull chromatids to either end of the cell 4. nuclear membrane forms around either sets of chromosomes 5. cytoplasm divides and 2 new cells are formed
• stem cells are unspecialised and can self renew or differentiate into specialised cells
• stem cells are involved in growth and repair
• fertilisation is when the nuclei of sprem and egg fuse to form a zygote