295 - 29+ evidences for Macroevolution The Scientific Case...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
29+ evidences for Macroevolution The Scientific Case for Common Descent Statistical Support for Phylogenies A phylogeny is a best approximation of the correct, historical tree using a given phylogenetic method. Some phylogenetic analyses are strongly supported by the data, some are weakly supported, and different parts of a tree may have more support than others. When comparing two independently determined phylogenies, one must take into account the statistical support assigned to each branch of the phylogenies. As with all scientific analyses, the details of a phylogenetic tree may change as new information and data are incorporated (Maddison and Maddison 1992 , pp. 112-123; Li 1997 , pp. 36-146; Felsenstein 1985 ; Futuyma 1998 , p. 99; Hillis and Bull 1993 ; Huelsenbeck et al . 2001 ; Swofford et al . 1996 , pp. 504-509). Bootstrapping is the most popular statistical method for assessing the reliability of the branches in a phylogenetic tree (Felsenstein 1985 ). Bootstrapping is a statistical technique for empirically estimating the variability of a parameter (Efron 1979 ; Efron and Gong 1983 ). In a bootstrap analysis, a fictional dataset is created by randomly sampling data from the real dataset until a new dataset is created of the same size. This process is done repeatedly (hundreds or thousands
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/14/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

Page1 / 2

295 - 29+ evidences for Macroevolution The Scientific Case...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online