Consanguinity ("con- (with/together) sanguine (blood) -ity (noun marker)") refers to the property of being from the same kinship as another person.
Consanguinity
Relationship of 2 individuals by descent from a common ancestor. A consanguineous mating is one in which the mates are related. ie. first cousins.
Related Terms:
Mating ...
4. Connection by consanguinity or affinity; kinship; relationship; as, the relation of parents and children. Relations dear, and all the charities Of father, son, and brother, first were known. (milton) ...
Consanguinity -- genetic relationship. Consanguineous individuals have at least one common ancestor in the preceding few generations. Conservative change -- an amino acid change that does not affect significantly the function of the protein.
Nor can you rule out AR because the trait appears in every generation or because there is no consanguinity. A common AR trait can show a vertical pattern.
 See also: Express, Organ, Human, Origin, Variation
  
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