Evolutionary Tree of Placental Mammals (IMAGE)

University of California - Davis

Evolutionary Tree of Placental Mammals

Caption

Numbers on red branches from the first eutherian ancestor to Homo sapiens are the numbers of breakpoints in reconstructed ancestral chromosome fragments. Breakpoints are locations where a chromosome broke open, allowing for rearrangements. The number of breakpoints per million years is in parentheses. A total of 162 chromosomal breakpoints were identified between the eutherian ancestor and the formation of humans as a species.

Credit

Harris Lewin, UC Davis

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