Search results
Results from the WOW.Com Content Network
Ambilineality is a cognatic descent system in which individuals may be affiliated either to their father's or mother's group. This type of descent results in descent groups which are non-unilineal in the sense that descent passes either through women or men, contrary to unilineal descent, whether patrilineal or matrilineal.
An example of an Ambilineal lineage. In ambilineal lineage, descent is traced through either the maternal and/or the paternal lines, usually meaning that the individuals choose whether to affiliate with their mother or their father's group, or both. [14] [15] Ambilineal lineage can be bilineal or bilateral.
There are four main headings that anthropologists use to categorize rules of descent. They are bilateral, unilineal, ambilineal and double descent. [9] Bilateral descent or two-sided descent affiliates an individual more or less equally with relatives on his father's and mother's sides. A good example is the Yakurr of the Crossriver state of ...
A DNA segment is identical by descent (IBD) in two or more individuals if: they have inherited it from a common ancestor without recombination, that is, the segment has the same ancestral origin in these individuals; the segment is maximal, that is, it is delimited at both ends by ancestral recombination events. [1]
The idea of a tree of life arose from ancient notions of a ladder-like progression from lower into higher forms of life (such as in the Great Chain of Being).Early representations of "branching" phylogenetic trees include a "paleontological chart" showing the geological relationships among plants and animals in the book Elementary Geology, by Edward Hitchcock (first edition: 1840).
A lineage is a single line of descent or linear chain within the tree, while a clade is a (usually branched) monophyletic group, containing a single ancestor and all its descendants. [3] Phylogenetic trees are typically created from DNA, RNA or protein sequence data. Apart from this, morphological differences and similarities have been, and ...
Cladistics – Method of biological systematics in evolutionary biology; Computational phylogenetics – Application of computational algorithms, methods and programs to phylogenetic analyses; Common descent – Characteristic of a group of organisms with a common ancestor; Evidence of common descent – Common ancestor evolutionary evidence
Matrilineality in Judaism or matrilineal descent in Judaism is the tracing of Jewish descent through the maternal line. Close to all Jewish communities have followed matrilineal descent from at least early Tannaitic (c. 10–70 CE) times through modern times. [109] The origins and date-of-origin of matrilineal descent in Judaism are uncertain.