Download Mutation, Evolution, and Natural Selection

Mutation, Evolution, and Natural Selection
DNA is found in the ______________
of the cell
 Http://www.youtube.com/watch?v=ZK6YP1Smbxk
Mutation
 A mutation is a ____________________________________.
 There are many different types of mutations and causes for them.
 Some mutations are ______________, while others can be
______________.
Harmful
Beneficial
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?
 ______________________________________________
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!
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
Darwin
Galapagos
Voyage of H.M.S.
Beagle, 1831 - 1836
90 feet of ship, 74
people living
together for 5
years...
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
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
______________________________________________.
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
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
Why does this not work?
Change through use and disuse
Natural Selection’s Explanation
Ancestors had different
neck lengths
Through natural selection,
longer necks survived and
passed on their genes.
Eventually, all giraffes
had only long necks
ONE ancestor, many varieties
What are the
different types?
What could
cause all the
variety?