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Chapter 27 Human Genetics PowerPoint Presentation
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Chapter 27 Human Genetics - PowerPoint PPT Presentation


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Chapter 27 Human Genetics. Chapter 27.1 Notes. 3 things about chromosomes Humans have 46 chromosomes in all body cells . Humans have 23 chromosomes in all sex cells (sperm or egg). Different organisms have different #’s of chromosomes.

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slide1

Chapter 27

Human Genetics

chapter 27 1 notes
Chapter 27.1 Notes

3 things about chromosomes

  • Humans have 46 chromosomes in all body cells.
  • Humans have 23 chromosomes in all sex cells (sperm or egg).
  • Different organisms have different #’s of chromosomes.
slide3
Amniocentesis is a way of looking at the chromosomes of a fetus.
  • 23rd pair of chromosomes determine sex (male/female) they are called sex chromosomes. Female= XX and Male= XY
  • Autosomes are chromosomes that do NOT determine sex (1-22nd pairs)
slide4

Amniocentesis

Human Karyotype

Autosomes pairs 1-22

Sex cells the last pair (23)

work cited
Work Cited
  • “amniocentesis”. April 30, 2007. http://health.yahoo.com/media/mayoclinic/images/image_popup/pr7_amnio.jpg
  • “Karyotype”. April 30, 2007. http://www.laskerfoundation.org/rprimers/gnn/wagn/images/karyotype.gif
  • “Purple Karyotype”. April 30, 2007. http://fairmanstudios.com/images/human_genetics.jpg