Sunday, October 26, 2014

My Year of Darwin 10/26/2014: Phylogenetic tree in Origin of Species

 Charles Darwin

"The intervals between the horizontal lines in the diagram, may represent each a thousand generations; but it would have been better if each had represented ten thousand generations. After a thousand generations, species (A) is supposed to have produced two fairly well-marked varieties, namely a1 and m1." Charles Darwin, Origin of Species 1st edition (on Kindle)

Phylogenetic trees are the primary way we show relationships between organisms and, if we plot characters, how characters evolve. They are exceedingly useful devices and knowing how do build these and interpreting them should be part of every biology major's education. 

File:Origin of Species illustration cropped.png

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