SwitchingGenesOnandOff_Fall_2010

SwitchingGenesOnandOff_Fall_2010 - October 12, 2010...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: October 12, 2010 Switching Genes On and Off Yes . MSU 34 Michigan 17 Science Finding Ways to Regrow Fingers By MALCOLM RITTER, The Associated Press Feb 18, 2007 This salamander has been made to grow an extra arm out of its natural left arm as the result of an experimental procedure. NEW YORK - Researchers are trying to find ways to regrow fingers - and someday, even limbs - with tricks that sound like magic spells from a Harry Potter novel. There's the guy who sliced off a fingertip but grew it back, after (scientists) treated the wound with an extract of pig bladder . And the scientists who grow extra arms on salamanders. And the laboratory mice with the eerie ability to heal themselves. This summer, scientists are planning to see whether the powdered pig extract can help injured soldiers regrow parts of their fingers . And a large federally funded project is trying to unlock the secrets of how some animals regrow body parts so well , with hopes of applying the lessons to humans. The implications for regrowing fingers go beyond the cosmetic. People who are missing all or most of their fingers, as from an explosion or a fire, often can't pick things up, brush their teeth or button a button. If they could grow even a small stub, it could make a huge difference in their lives. Switching Genes On/Off How do cells know what to do? Its in their genes! Multi-cell organisms come from only one cell.-- that one cell divides again and again-- it differentiates into various tissues and organs-- how do cells know which organs to become? How do plants know when to flower? When you eat food, why do digestive juices increase? How do plants know to turn on anti-freeze mechanisms on cold nights? When you feel tired, why do you sleep? When you run, why do you feel good? Can cells live forever? How do cells (and organisms) know when to stop growing? The answers lie in our genes !! Genes make proteins, and proteins keep things going!!-- Proteins keep us covered (hair and feathers)-- They give us nails (weapons? tools?)-- Enzymes speed up reactions-- Hormones cause things to happen (or to NOT happen) .. and lots of other things!! Genes also know when to STOP doing things! Why and how do they do this???? Why do certain cells become only certain tissues/organs?...
View Full Document

Page1 / 19

SwitchingGenesOnandOff_Fall_2010 - October 12, 2010...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online