Meiosis Learning Objectives: Wednesday, 28 November 2018 Meiosis Learning Objectives: 1. Explain how gametes are made by meiosis 2. Describe differences and similarities between mitosis and meiosis Starter Draw and label a sperm and egg cell in your book – don’t look back in your book! 

Meiosis A special type of cell division producing gametes Happens in primary sex organs Ovaries and testes Gametes contain half the number of chromosomes. This is called haploid Meiosis results in variation http://www.cellsalive.com/meiosis.htm

Stages of meiosis

2 Main stages Homologous chromosomes separated. Creates 2 daughter nuclei 2 daughter nuclei divide. Chromosomes themselves are seperated. Creates 4 gametes.

Similarities and differences between meiosis and mitosis Where does it occur All over the body Sex organs Number of divisions 1 2 Creates All cells apart from gametes Gametes Number of chromosomes 46 (diploid) 23 (haploid) Produces Two cells Four cells Function Cellular reproduction, growth Sexual reproduction