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A cousin is a relative that is the child of a parent's sibling; this is more specifically referred to as a first cousin.. More generally, in the kinship system used in the English-speaking world, a cousin is a type of relationship in which relatives are two or more generations away from their most recent common ancestor.
As a working definition, unions contracted between persons biologically related as second cousins or closer (r ≥ 0.03125) are categorized as consanguineous. This arbitrary limit has been chosen because the genetic influence in marriages between couples related to a lesser degree would usually be expected to differ only slightly from that ...
In discussing consanguineal kinship in anthropology, a parallel cousin or ortho-cousin is a cousin from a parent's same-sex sibling, while a cross-cousin is from a parent's opposite-sex sibling. Thus, a parallel cousin is the child of the father's brother (paternal uncle's child) or of the mother's sister (maternal aunt's child), while a cross ...
The degree is the number of generations subsequent to the common ancestor before a parent of one of the cousins is found, while the removal is the difference between the number of generations from each cousin to the common ancestor (the difference between the generations the cousins are from). [67] [68]
Mexican society is composed of three-generational units consisting of grandparents, children, and grandchildren. Further close relationships are maintained with the progenitors of these families and are known as kin or "cousins". When one is born, they are born into two extended families, a kinship group of sometimes 70 people.
A travel insurance policy which covers curtailment due to the death or illness of a member of the policy-holder's "immediate family" uses a wide definition but adds residential requirements: "Immediate Family is your Partner, and: parents, children, stepchildren, fostered or adopted children, brothers, sisters, aunts, uncles, cousins, nephews ...
Family tree showing the relationship of each person to the orange person, including cousins and gene share. A family tree, also called a genealogy or a pedigree chart, is a chart representing family relationships in a conventional tree structure. More detailed family trees, used in medicine and social work, are known as genograms.
The coefficient of relationship is a measure of the degree of consanguinity (or biological relationship) between two individuals. The term coefficient of relationship was defined by Sewall Wright in 1922, and was derived from his definition of the coefficient of inbreeding of 1921.