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Abnormal Meiosis

Abnormal Meiosis. Biology 12. Running out of cell jokes…. There are genetic abnormalities that result from errors during meiosis Chromosomes do not separate properly during either anaphase I or II. So some gametes have too many or too few chromosomes

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Abnormal Meiosis

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  1. Abnormal Meiosis Biology 12

  2. Running out of cell jokes…

  3. There are genetic abnormalities that result from errors during meiosis • Chromosomes do not separate properly during either anaphase I or II. • So some gametes have too many or too few chromosomes • Many of these gametes will die • Some may live and have genetic disorders Abnormal Meiosis:

  4. Is when two homologous chromosomes move to the same pole during meiosis • One cell gets both the homologous chromosomes and the other gets neither of these chromosomes • The result is that all cells in this organism will have this abnormality. Nondisjunction:

  5. Complete notes from book on the terms on the next slide • Nondisjunction Colouring sheet (colour and/or label) • Prenatal Diagnosis Options Assignment • Due Mon Oct 1st To do:

  6. Trisomy • Monosomy • Down Syndrome • Klinefelter Syndrome • Turner Syndrome • Multiple marker screen *Pages 116-121 *Diagrams would be helpful! Record in your notes a definition, (including what happens to which chromosomes) for the following:

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