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Natural selection 2010-11

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by

Adam Taylor

on 23 September 2013

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Transcript of Natural selection 2010-11

1. genetic variation
2. inherited traits
3. over production of offspring
4. Struggle for survival.
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ask students too walk through - and give examples pull sticks
We need to find mutations!!!
Natural Selection and
Un-Natural Selection

Now talk about how
we got from 1 to 2
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What
about
dogs?
Definition for Evolution?
Change in allele frequency from generation to generation.
Change in the dominant traits from parent to offspring.
These results were selected for by humans
Each generation a little more of what people were looking for. Small changes in the allele frequency.
What other things are the result of
artificial selection or selective breeding?
Look it up.

So if humans can affect the change
in an organism why can't nature.

samuri crab
Name an animal that fits nicely into its environment.
Think about
body shape
body size
color
method for catching food
methods for avoiding capture
Natural selection
Steps to Natural selection
1. Genetic variation
everyone is different.
2. Overproduction of offspring - more babies are produced than can survive.
3. Inherited traits - the ones that survive pass on their traits to their offspring.
So how do new types of traits start.
What does survival of the fittest mean?
Fastest
Strongest
Smartest
weakest
slowest
Best suited for
the environment
smallest
?
Yes
Which also means
http://hecmwb.wordpress.com/category/uncategorized/
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Full transcript