Cell division

Cell division

Cell division

Mitosis

  • Ordinary cell division
  • Same number of chromosomes in new cells
  • New cells identical to parent cell
  • For growth
  • For asexual reproduction
  • In body cells

Meiosis

  • Reduction cell division
  • Half the number of chromosomes
  • New cells different mix of chromosomes and genes
  • For making gametes
  • For sexual reproduction
  • In reproductive organs

Chromosomes are threads of DNA which carry the genetic material (genes). In humans there are 23 pairs of chromosomes. In sex chromosomes there are only half the number.

Life processes and cell activity

Cells, Tissues and Organs

Cells, Tissues and Organs

Life processes and cell activity

Diffusion and Osmosis

Diffusion and Osmosis

Life processes and cell activity

Life processes

Life processes

Life processes and cell activity

Specialised Cells

Specialised Cells