Mitosis, meiosis

• What is sexual reproduction 


  Reproduction that requires a male and female partner involving fertilisation of gametes
• Asexual reproduction 


  Reproduction that requires one parent , resulting in genetically identical offspring
• Stages of mitosis

  Prophase

  metaphase - middle

  anaphase -away

  telophase - division
• Meiosis


  Halves the number of chromosomes in cells
• Meiosis

  1. Produces cells with the diploid number of chromosomes

  2. Produces cells with the haploid number of chromosomes

  3. Produces new genetic combinations in individuals

  4. Produces gametes (sex cells)

  5. Produces 4 daughter cells
• When out of control

  Cancerous tumour result
• Daughter cells


  Copies of the parent cell
• Meiosis is important for the growth of plants and animals
• Chromosomes of the parent cell are duplicated in the daughter cells
• Reduction division is important for the repair of damaged tissue where new cells are needed to replace damaged cells
• DNA is copied exactly (if there are no mutations) in meiosis
• Meiosis increases the variety of offspring and provides a varied stock of individuals
• Meiosis produces clones
• Duplicated


  A process where the original chromosomes are copied exactly, resulting in two identical sets of chromosomes in the daughter cells.
• Recombined

  A process where the original chromosomes are rearranged or exchange genetic material to create new combinations of genes in the daughter cells.