1 / 20

Quotation of the Day

Quotation of the Day. “The Ramones don’t jam.” — Jerry Harrison. About our schedule MARCH 21: NO CLASS MARCH 26: NO CLASS The next time we meet: MARCH 28: QUIZ #4 ON SINGER. CLONING. Cloning!. How babies are made (PG version) Sperm fertilizes ovum.

anneliese
Download Presentation

Quotation of the Day

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. Quotation of the Day “The Ramones don’t jam.” — Jerry Harrison

  2. About our schedule MARCH 21: NO CLASS MARCH 26: NO CLASS The next time we meet: MARCH 28: QUIZ #4 ON SINGER

  3. CLONING

  4. Cloning!

  5. How babies are made (PG version) Sperm fertilizes ovum. This takes place in fallopian tube. Fertilized ovum is a single cell. It divides a few times. The cell-cluster travels down tube, into uterus. The cell-cluster attaches to the uterus wall. Nine months later, a baby is born.

  6. But . . . The process of fertilization and cell-division is very delicate, and things can go wrong. About 40% of the time, the cell-cluster never implants in the uterine wall. It is washed out with the monthly menstrual flow, and the woman never knows that she almost got pregnant.

  7. But . . . • 1 in 12 couples is infertile, and today this is treated as a medical problem. • Treatments include: • scheduled sex • fertility drugs • IVF

  8. In vitro fertilization

  9. Some facts about in vitro fertilization • Current cost: $10,000 per try • Chances of success: 25% • Chances of birth defects: same as in “normal” pregnancy • In U.S., since 1981, about 45,000 children have been born in this way.

  10. Leon Kass President Bush’s Ethics Adviser Pope John Paul II Leading opponents of IVF

  11. Ethical Objections: • It’s unnatural--we are “tampering with sacred things.” • the problem of the discarded embryos • the slippery slope

  12. Cystic Fibrosis • a genetically transmitted disease • 1 in 22 caucasians are carriers • if both parents are carriers, 25% chance the baby will actually have the disease

  13. What can be done? Genetic screening • instead of beginning pregnancy in the “normal” way, use IVF techniques • after fertilization occurs, when zygote is 4-8 cells, see if zygote will have CF • implant only zygotes without CF • so far there have been about 200 successful screenings of this sort

  14. Cloning?

  15. Cloning Somatic Cell Transfer

  16. The Three Most Important Facts About Human Cloning A clone would be a baby just like any other baby. There is no important difference between a clone and an identical twin. You cannot duplicate yourself.

  17. Would cloning be unethical? The most popular arguments: • A clone would not have a soul. • A clone would have no mother or father. • Clones could be used for “spare parts.” • Rich people would want to make copies of themselves. • If we cloned Michael Jordan five times, we would have a hell of a basketball them.

  18. Would cloning serve any good purpose? • A couple has a child, call him Bobby. • Bobby is killed. • They want to have another child, • but the man is sterile. • Bobby’s tissue samples still exist. • They can use SCT techniques to have a child with Bobby’s DNA. • Would this be wrong?

  19. But there’s a good reason why human cloning should not be done at the present time: • Our techniques are not yet good enough to ensure that the baby would be OK.

More Related