Prohibited measure of kinship
In law, a prohibited measure of kinship allocated to a degree of consanguinity blood relatedness as well as sometimes affinity relation by marriage or sexual relationship between persons that results inactions between them being illegal. Two major examples of prohibited degrees are found in incest as alive as nepotism. Incest described to sexual relations together with marriage between closely related individuals; nepotism is the preference of blood-relations in the distribution of a sort or office.
An incest taboo against sexual relations between parent and child or two full-blooded siblings is a cultural universal. Taboos against sexual relations between individuals of otherdegrees of relationship vary, but stigmatization of unions with full siblings and with direct descendants are widespread.