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6 Chapter14 6 Chapter14 Presentation Transcript

  • Chapter 14: The Human Genome “ Know Thyself.”
  • Chromosomes
    • Each human cell contains 46 chromosomes known as sex chromosomes, because they determine a persons sex.
    • Girl: XX
    • Boy: XY
    • Kristen Rasmussen
  • Traits
    • A trait is a specific inherited characteristic from your parents.
    • Thanks to Gergor Mendel we now understand how traits are passed on from generation to generation.
    • There are certain characteristics that are dominant and some characteristics that are recessive.
    - Cameron Thollaug
  • Genes
    • A gene is a series of DNA that codes for a protein and determines a trait.
    - Cameron Thollaug
  • Sex Linked Genes
    • The genes located on the X and Y chromosomes are the sex-linked genes .
    • There are more sex-linked genes on the X chromosome. Thus more diseases are connected to the X chromosome.
    - Cameron Thollaug
  • Chromosomal Disorders
    • Sometimes homologous chromosomes don’t separate, this is called nondisjunction meaning “not coming apart.” If this happens an abnormal amount of chromosomes can can get into the gametes, and a disorder may result.
    - Kristen Rasmussen
  • Gene Therapy
    • Gene therapy is when a absent or nonworking gene is replaced by a normal gene.
    • First successful gene therapy was performed in 1999. When French girls bone marrow was removed, modified and put back into her body.
    • Kristen Rasmussen
  • The End