4. stem cells

• stem cell?

  undifferentiated cell that gives rise to other specialised cell types (no limit to division, 3 different types)
• totipotent cell?

  undifferentiated stem cell giving rise to all 216 specialised cell types, no limit to division all genes on
• pluripotent cell?

  undifferentiated stem cell that gives rise to most specialised cell types, except totipotent embryonic cells. no limit, some genes off
• multipotent cells?

  undifferentiated stem cells that give rise to only specialised cell types of closely related family like blood. many genes off
• what are induced pluripotent stem cells?

  multipotent somatic cells, genetically reprogrammed to be like embryonic stem cells.