1 / 13

Genetic applications

Genetic applications. Crossing over. What is crossing over? Is there an advantage to this?. Telomeres. What are they? Caps at the ends of chromosomes Scientists have determined that telomeres reduce in length each time a cell goes through the cell cycle and divides

akasma
Télécharger la présentation

Genetic applications

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Genetic applications

  2. Crossing over • What is crossing over? • Is there an advantage to this?

  3. Telomeres • What are they? • Caps at the ends of chromosomes • Scientists have determined that telomeres reduce in length each time a cell goes through the cell cycle and divides • How is this related to stress? http://www.iflscience.com/health-and-medicine/stress-can-alter-your-genome

  4. Dolly • Dolly developed arthritis and died at the age of six • How do telomeres help explain this? (pg. 570) • Perhaps since Dolly was cloned from already aged cells the telomeres were shorter in length

  5. Cancer • What is cancer anyway? • Uncontrolled cell divisions= called metastasis • This is why there is no ‘cure’ or ‘vaccine’ because the cells are your own • How does it relate to telomeres? • they do not lose their ability to divide and their telomere length is also maintained

  6. Abnormal Meiosis • Nondisjunction • Polyploidy • Trisomy • Monosomy

  7. Disorders • Klinefelter • Down Syndrome (Trisomy 21) • Turner • Trisomic female

  8. Identification • Karyotype chart: map of homologous chromosomes in order; contains 23 sets • #23 are the sex chromsomes

  9. Karotyping

  10. Problem?

  11. Problem?

  12. You try • Pg. 585 Exercise 1 and Practice #1 on pg. 586

  13. Tomorrow- possibilities • Microscopes • DNA extraction • Review

More Related