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:12/5/2018)... ... December 04, 2018 , ... Urological Associates of Southern ... Center of Excellence. The designation recognizes that Dr. Choi has achieved a high ... to exemplary care for men suffering from symptoms associated with Benign Prostatic Hyperplasia ...
(Date:11/29/2018)... ... November 29, 2018 , ... Tosoh Bioscience LLC announced ... acquiring full ownership. The transaction was approved by the Board of Directors of ... “We are extremely pleased to team up with Tosoh Bioscience to offer customers ...
(Date:11/27/2018)... ... November 27, 2018 , ... LabArchives today announced a ... integrate the LabArchives Classroom Edition with Current Protocols Essential Laboratory Techniques for use ... January of 2019. , The integration of LabArchives Classroom Edition and ...
Breaking Biology News(10 mins):
Other biology definition