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New Generations

Year 10, Pathway C 2012. New Generations. Outcomes. Identify genetic disorders from too many/ too few body and sex chromosomes Explain how genetic disorders occur. Genetic Disorders. There are three ways to be born with a genetic disorder: 1. Too many/not enough sex chromosomes

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New Generations

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  1. Year 10, Pathway C 2012 New Generations

  2. Outcomes • Identify genetic disorders from too many/ too few body and sex chromosomes • Explain how genetic disorders occur

  3. Genetic Disorders • There are three ways to be born with a genetic disorder: • 1. Too many/not enough sex chromosomes • 2. Too many body chromosomes • 3. Mutation of genes

  4. A normal karyotype

  5. Genetic Disorders • Too many sex chromosomes: • Klinefelter’s syndrome (male) • Triplo X syndrome (female) • Extra X chromosome • Infertility • XXY or XXX

  6. Klinefelter’sKaryotype

  7. Genetic Disorders • Too few sex chromosomes : • Turner’s syndrome • Only one sex chromosome (X) • Short stature • Webbed neck

  8. Turner Syndrome Karyotype

  9. Genetic Disorders • Too many body chromosomes results in down syndrome • 47 chromosomes instead of 46 • Impairment of learning ability • Minor physical abnormalities

  10. Down syndromkaryotype

  11. Genetic Disorders • What causes these? • Let’s investigate

  12. Genetic Disorders • Genetic disorder are caused by mistakes made during meiosis

  13. Genetic Disorders – The cause

  14. Outcomes • Identify genetic disorders from too many/ too few body and sex chromosomes • Explain how genetic disorders occur

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