1. 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! Friday, 05 February 2016 Meiosis

2. A special type of cell division producing gametes Happens in 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

3. Stages of meiosis

4. 2 Main stages 1.Homologous chromosomes separated. Creates 2 daughter nuclei 2.2 daughter nuclei divide. Chromosomes themselves are seperated. Creates 4 gametes.

5. Activity Using pipe cleaners (4 different colours) OR string – model the stages of meiosis Do this in your book. Label your diagrams

6. Similarities and differences between meiosis and mitosis MitosisMeiosis Where does it occur Number of divisions Creates Number of chromosomes Produces Function

7. Similarities and differences between meiosis and mitosis MitosisMeiosis Where does it occurAll over the bodySex organs Number of divisions12 CreatesAll cells apart from gametes Gametes Number of chromosomes 46 (diploid)23 (haploid) ProducesTwo cellsFour cells FunctionCellular reproduction, growth Sexual reproduction

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