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Chromosomes
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Chromosomes

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Chromosomes Chromosomes Presentation Transcript

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