Scientists were able to turn the clock
behind on evolution and see how water striders evolved to be the way they are
today. The scientists were looking at the antenna on males used in sexual
attraction. The male with the bigger and
more complex antenna got to mate more frequently than a male with a feminine antenna. They were able to change the gene that
modified the antenna. Once this gene was
isolated and altered they were able to see a correlation between the different
antennas.
http://www.sciencedaily.com/releases/2012/05/120503142534.htm
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