Chromosomes

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Chromosomes

  1. 1. Chromosomes
  2. 2. chromosome number: <ul><li>each organism has a characteristic number of chromosomes </li></ul><ul><ul><li>humans have 46 (in 23 pairs) </li></ul></ul><ul><ul><li>dogs have 78 (39 pairs) </li></ul></ul><ul><li>having a full set of chromosomes, the right types in the right numbers is important </li></ul>
  3. 3. chromosomes ( X and Y)
  4. 4. human karyotype
  5. 5. commercial vs. wild strawberries <ul><li>polyploid </li></ul><ul><li>diploid </li></ul>
  6. 6. bearded vs. wild irises <ul><li>polyploid </li></ul><ul><li>diploid </li></ul>
  7. 7. calico cats are almost always female (otherwise they have a chromosomal abnormality
  8. 8. gene mapping: <ul><li>sections of DNA that code for specific proteins are called genes </li></ul><ul><li>the proteins produced from these genes determine specific characteristics </li></ul><ul><li>genes exist in specific locations on specific chromosomes </li></ul>
  9. 10. genes can now be added to chromosomes that will code for new traits

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