Sentence examples for shared ancestors from inspiring English sources
Now those who want to research their Danish heritage can send Mr. Lundin a family tree in a format called Gedcom (from genealogical data communications), and his software will search a collection of family trees from other contributors for shared ancestors and cousins.
In the late nineties, Ballou devised a simple measure of genetic rarity, called "mean kinship," for determining which animals in any captive population should be favored for breeding; it's based on the number of shared ancestors and the closeness of those relationships, and it's relatively easy to calculate.
Mr. Asma shows, for example, that at the American Museum of Natural History in Manhattan, the Hall of Vertebrate Origins, which opened in 1996, is strictly organized on a "cladistic" principle of taxonomy: animals are grouped not by shared surface characteristics and functions, but by shared ancestors.
c shows the groupings of related species and their shared ancestors, which are known as "clades".
The important point in calculating relatedness is not the number of intervening nodes along a given branch but the number of shared ancestors.
Some people think the higher the number of internal nodes between groups of species the more distantly related they are instead of considering the number of shared ancestors.
Random infrequent changes once again provide a way of estimating the number of generations back to a shared ancestor.
These lineages together with their shared ancestor represent a clade (amniotes) in which the first two clades are nested.
They were also able to infer what the brain of the creatures' most recent shared ancestor might have looked like.
Groups that do not include the most recent shared ancestor or that include only some of an ancestor's descendants are not clades.
In this case, information is available about the common ancestors, and it is clear that both descendants have been larger than their shared ancestor following every branching event.
