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Mutation, Evolution, and Natural Selection

Mutation, Evolution, and Natural Selection. Http://www.youtube.com/watch?v=ZK6YP1Smbxk. DNA is found in the ______________ of the cell. Mutation . A mutation is a ____________________________________. There are many different types of mutations and causes for them.

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Mutation, Evolution, and Natural Selection

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  1. Mutation, Evolution, and Natural Selection • Http://www.youtube.com/watch?v=ZK6YP1Smbxk DNA is found in the ______________ of the cell

  2. Mutation • A mutation is a ____________________________________. • There are many different types of mutations and causes for them. • Some mutations are ______________, while others can be ______________.

  3. Beneficial Harmful

  4. How does mutations work? • DNA is very accurate when making copies of itself, however, sometimes it makes a mistake. • Here’s a DNA sequence • AGCCCTTATAGGCTC • What are the corresponding base pairs? • ______________________________________________ • Now when it’s being copied it replaces the T with a U. Rewrite the your answer with U’s instead of T’s. • ______________________________________________ • What amino acids will this be coded for? • ______________________________________________

  5. The Mutation • Here’s our original DNA sequence • AGCCCTTATAGGCTC • ATCCCTTATAGGCTC we replaced the G with a T • Now what are the corresponding base pairs? • ______________________________________________ • Now when it’s being copied it replaces the T with a U. Rewrite the your answer with U’s instead of T’s. • ______________________________________________ • What amino acids will this be coded for? • _______________________________________________ • You can see how replacing 1 base will change everything!

  6. Who was Charles Darwin? • British scientist that in 1859 published The Origin of Species • Stated that all life come from a ___________________ called _______________ • This happens by a process called _______________________. • http://www.youtube.com/watch?v=nMgLF8n4DnA

  7. Darwin Galapagos Voyage of H.M.S. Beagle, 1831 - 1836 90 feet of ship, 74 people living together for 5 years...

  8. Evolution • Evolution is the _______________________________ (passed on from parents to offspring) of a population over ___________________________. These traits could be physical, chemical or behavioral. • This change is caused by ____________________________________. • http://www.youtube.com/watch?v=yVqJ_mQazik

  9. Adaptation • Adaptation is the evolutionary process where a population becomes ____________________________. • This process takes place over _____________________. • The term adaptation may also refer to a ____________ which is ____________________________________.For example, the adaptation of horses' teeth to the grinding of grass, or their ability to run fast and escape predators. • Such adaptations are produced in a variable population by the better suited forms reproducing more successfully, which is ______________________________________________.

  10. How does Evolution Work? • Natural Selection- ________________________________ • Natural selection is simply the logical result of four features of living systems: • _________________- individuals in a population vary from one another (different genes caused by mutations) • _________________- parents pass on their traits to their offspring genetically • ______________ - some variants reproduce more than others • ___________ - successful variations accumulate over many generations

  11. There are 2 variations of the beetles, _________________________________ The birds prefer eating the green beetles. Over generations the ______ beetles increase in population because __________________________________ _________ survive to produce more offspring. Generations later…. Over time the red beetles have been selected over the green beetles

  12. Why does this not work? Change through use and disuse

  13. Natural Selection’s Explanation Ancestors had different neck lengths Eventually, all giraffes had only long necks Through natural selection, longer necks survived and passed on their genes.

  14. ONE ancestor, many varieties What are the different types? What could cause all the variety?

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