Navigation Links
Monophyletic


In phylogenetics, a group is monophyletic (Greek: of one stem) if all organisms in that group are known to have developed from a common ancestral form, and all descendants of that form are included in the group. A taxonomic group that contain organisms but not their common ancestor is called polyphyletic, and a group that contain some but not all descendants of the most recent common ancestor is called paraphyletic.

For example, all organisms in the genus Homo are believed to have come from the same ancestral form in the family Hominidae, and no other descendants are known. Thus the genus Homo is monophyletic. If, on the other hand, it were discovered that Homo habilis had developed from a different ancestor than Homo sapiens, and this ancestor was not included in the genus, then the genus would be polyphyletic. Since biologists by and large prefer groups to be monophyletic, in this case they would likely either split the genus or broaden it to include the additional forms.

It should be noted that evolutionary taxonomists use the term holophyletic for the sort of groups discussed here, whereby monophyly includes both holophyly and paraphyly.

See also


'"/>


(Date:11/16/2016)... Nov. 16, 2016 Sensory Inc ., ... security for consumer electronics, and VeriTran , ... retail industry, today announced a global partnership that ... to authenticate users of mobile banking and mobile ... software which requires no specialized biometric scanners, ...
(Date:6/27/2016)... Research and Markets has announced the addition of the ... The report forecasts the biometrics ... a CAGR of 12.28% during the period 2016-2020. ... with inputs from industry experts. The report covers the market landscape ... includes a discussion of the key vendors operating in this market. ...
(Date:6/20/2016)... 20, 2016 Securus Technologies, a leading ... for public safety, investigation, corrections and monitoring announced ... it has secured the final acceptance by all ... Managed Access Systems (MAS) installed. Furthermore, Securus will ... be installed by October, 2016. MAS distinguishes between ...
Breaking Biology News(10 mins):
Other biology definition