• Discussion Fanatics

    Polyphyletic group is a taxon that consists of unrelated organisms who are from a different recent common ancestor. This group lacks a most recent common ancestor. Monophyletic group includes all descendants of the ancestor. Paraphyletic group does not include all the descendants of the ancestor.

  • Discussion Fanatics

    In modern usage, a monophyletic taxon is defined as one that includes the most recent common ancestor of a group of organisms, and all of its descendents [as in (a)]. A polyphyletic taxon is defined as one that does not include the common ancestor of all members of the taxon [as in (b)].

    Similarly, what is the difference between monophyletic and paraphyletic? In cladistics, a monophyletic group is a group of organisms that forms a clade, which consists of all the descendants of a common ancestor. A paraphyletic group consists of all of the descendants of a common ancestor minus one or more monophyletic groups.

    Also question is, what does it mean for a clade to be monophyletic paraphyletic or Polyphyletic?

    Only monophyletic groups qualify as legitimate taxa in cladistics. Paraphyletic - a group of organisms that includes an ancestor but not all of its descendants. Polyphyletic - one that does not include the common ancestor of all members of the taxon.

    What is a paraphyletic group?

    A paraphyletic group is a group of organisms that includes an ancestor but not all of its descendants. Learn more about paraphyletic groups and some examples of them in this lesson.

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