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Date ___________________ Period ______ Evolution WebQuest
Part A: Flip through the University of Utah “Learn Genetics” Lab (Recipe for Evolution) to answer the
1. What three things make up the “recipe” for Evolution?
● Reproductive advantage
What are the two modes of genetic variation of organisms?
a. How would a mutation increase genetic variation? (THINK about it! it’s not in the
Because it creates entirely new alleles which increase variety
video) Genetic recombination
b. How would genetic recombination increase genetic variation? Recombination increases the genetic diversity in sexually reproducing
organisms and can allow an oorganisms to function in new ways. b. Natural Selection
What are three types of selection pressures that could act on and eliminate organisms with
ii. Describe what happens to the organisms with the most favorable traits?
It is able to reproduce and pass down its traits iii. Summarize what is happening during natural selection (red/yellow slide).
During natural selection the organisms with the most
favorable traits are able to survive and reproduce c. Time
Explain the role of time in evolution
With time the animals develop new traits which leads to
evolution 2. In your own words, how do the 3 parts of the “ evolution recipe” work together to evolve species and
All the 3 recipes work together by making a staircase, what I mean by this is that
variation or different traits leads to passing down the traits or heritability and
reproductive advantage allows for more fitness. Part B: Learn about the basics of evolution at
3. What is evolution and what is it responsible for?
Evolution is the changes of traits in an animal over a long period of
time, and it is responsible for many of the traits us humans have now. 4. [Click ‘next’] When does evolution take place?
Evolution only occurs when there is a change in gene frequency within
a population over time.
5. Only inherited ______________________
differences that can be passed on are acted upon by evolution. 6. Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of
evolution? Defend your answer with an explanation.
Beetles on a diet is an example of evolution because the beetles had to adapt to the changes in their environment which in this
case was a food shortage and they adapted by eating less and therefore they became smaller 7. [Click ‘next’] Identify and describe the four basic mechanisms for evolutionary change in your own words!
A mutation is a change in the gene frequency that results in physical changes. Some organisms of one population moving to another Genetic drift Genetic drift is the change in the frequency of an existing gene variant in a population due
to random sampling of organisms. Natural selection Organisms with the best traits for survival, survive and reproduce evolution
8. Genetic drift and natural selection only take place if there is ___________________
__________________. 9. [Click next several times to read about mutations] Now complete the paragraph below regarding gene flow.
“Gene flow, also called _________________,
is any movement of ______________
to another. Gene flow includes lots of different kinds of events, such pollen
being blown to a new destination or people moving to new cities or
countries. If ______________
are carried to a population where those genes previously did not
can be a very important source of genetic
gene flow brown
In the graphic on the website, the gene for _________________ coloration moves from one population to another.”
10. [Click next and read until you get to Genetic Drift] Summarize the idea behind genetic drift.
genetic drift is basically the variation in the relative frequency of different genotypes in a small population, owing to the
chance disappearance of particular genes as individuals die or do not reproduce. 11. [Click next] Natural selection is the most important mechanism behind evolution. This webpage gives you
an example of natural selection involving beetles. Read the descriptions and look at the cartoons. Explain what
has happened to this population of beetles, using the following terms: Adaptation, Survive, Reproduce, Gene,
Natural Selection, Species, and Evolution.
Due to the fact that the bird eats the beetles species that is green, they must adapt to
get a brown coloration in order to survive and reproduce. This is an example of
natural selection because the beetles with the gene to be a different color survive. 12. How do the finches of the Galapagos Islands demonstrate evolution?
Finches on the Galapagos demonstrate evolution because their breaks are evolved
to eat tougher seeds which is a result of droughts and food shortages. 13. [Click next] Fitness does not necessarily mean “strongest.” Defend this statement.
Fitness does not mean the strongest because fitness is just having the best traits for
survival and reproduction, while the strongest may not have the best genes but it is
physical the strongest. ...
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