Is it likely that the selection coefficient (s) is similar in value for the three populations shown? Is it important to know if the amount of genetic variation for the trait under selection is approximately equal in all three populations in the graph? Why or why not?

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Is it likely that the selection coefficient (s) is similar in value for the three populations shown? Is it important to know if the amount of genetic variation for the trait under selection is approximately equal in all three populations in the graph? Why or why not?

(A)
(B)
1.0
0.9
0.8
0.7
0.6 - The melanic form of
Biston betularia declined
in frequency over more
than 40 years in 3 different
0.5
0.4
locations in Britain.
0.3
0.2
0.1
1960
1970
1980
1990
2000
Year
EVOLUTION de, Figure 5.1
O 2017 Sinauer Associates, Inc.
Frequency of melanic form
Transcribed Image Text:(A) (B) 1.0 0.9 0.8 0.7 0.6 - The melanic form of Biston betularia declined in frequency over more than 40 years in 3 different 0.5 0.4 locations in Britain. 0.3 0.2 0.1 1960 1970 1980 1990 2000 Year EVOLUTION de, Figure 5.1 O 2017 Sinauer Associates, Inc. Frequency of melanic form
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