Download Peppered Moths

Peppered Moth Evolution
__________________________
Ramshaw – Biology
_____________
Name
Hr. ______ Date
Borrowed and modified a bit from:
http://galileoweb.org/oconnorh/2010/10/15/biology-lesson-peppered-moths/ THANKS!
Peppered Moths
The table below represents data from a 10-year study of two varieties of the
same species of peppered moths. The numbers represent moths captured in
traps for 10 consecutive years. The traps were located in the same area each
year.
Year
Number of Light Number of Dark
Moths Captured Moths Captured
1
2
3
4
572
537
484
392
84
112
198
210
5
246
281
6
225
357
7
193
412
8
147
503
9
10
84
56
594
638
Create a DOUBLE LINE GRAPH
Use 2 different colors for
the right to identify your
titles AND numbers!). Make
using the above data on the graph below.
the 2 different lines. Complete the key on
lines. Label the X axis and Y axis (with
sure you also title your graph!
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Key to line color:
= Light
Moths
= Dark Moths
Questions:
Use the
textbook, the internet, and your noggin to answer the following:
1.
2.
What preys (eats) the peppered moth?
If the bark of trees is dark and the moth that rests there is lightcolored, what will happen to the moth?
3. What is a mutation?
4. What could have caused the first dark-colored moth to occur?
5. What caused the tree trunks of many trees in England to turn from a light
color to a dark color?
6. Which variety of moth increased over the 10-year period?
7. What is the name of this type of evolutionary change?
8. Using the data on the graph, draw a conclusion concerning the population
of peppered moths in the sampled area of England. (“The number of dark
moths may have increased, because…; the number of light moths may have
decreased, because…”)
ONLINE: Go to
http://www.millerandlevine.com/km/evol/Moths/moths.html
9. According to the web site, what is the conclusion that many scientists
“jumped to” about the carbonaria form of the moth.
10.
How has the countryside improved in recent years and why?
11. In recent years, what has happened to the carbonaria form (increased or
decreased in number)?
12. Did Michael E.N. Majerus consider Kettlewell’s experiments to be
correct or incorrect?
13. Describe 3 criticisms that Majerus had of Kettewell’s experiments.
(Hint: they have to do with where Kettlewell placed moths, how birds see
ultraviolet, and migration of moths).
14.
Is the story of the peppered moth “faked” or “incorrect”?
15. What should be done to be absolutely certain of exactly how natural
selection produced the rise and fall of the carbonaria form?
16. So, Kettlewell’s experiments were not wrong, but they were I N C __ __ P
L __ __ __.
17. Is the rise and fall of dark-colored moths (industrial melanism) an
example of natural selection? Why or why not?
The following questions are extra credit. You can choose to
answer all, some, one, or none. You can earn up to 3 points
extra credit per answer.
18.
Does natural selection act on the genotype or phenotype of an
organism? Explain. (Hint: let’s say a plant can get more sun if it’s taller. Does
natural selection happen because of the genes – genotype – of the plant or because of
the height – phenotype – of the plant?)
19.
Usually lethal alleles (like s for sickle cell anemia) disappear over
many generations. Explain why these potentially lethal alleles are carried
in a heterozygote (like Ss) and therefore maintained in a population.
20.
What is the advantage of having variation within a species?
21.
Describe three examples of natural selection that we have not talked
about in class.
1.
2.
3.
22.
Describe the effects of genetic drift on the diversity of organisms in
a population (use the textbook or the internet to answer this).
23.
How does reproductive or geographic isolation affect speciation?
the textbook or the internet to answer this).
(use