Blood relationship because of common ancestry.Everyone carries rare recessive alleles, rare genes that are generally innocuous in the heterozygous state but that in the company of another gene of the same type are capable of causing an autosomal recessive disease. We are all reservoirs for genetic disease. First cousins, as noted, share a set of grandparents. So for any particular allele (gene) in the father, the chance that the mother inherited the same allele from the same source is 1/8. Further, for any gene the father passes to his child, the chance is 1/8 that the mother has the same gene and ˝ that she transmits that gene to the child so 1/8 X ˝ = 1/16. Thus, a first-cousin marriage has a coefficient of inbreeding of 1/16. The added risks for first cousins depend not only upon this coefficient of inbreeding but also upon their genetic family histories and, in some cases, upon test results (for example, for beta thalassemia for first cousins of Italian descent). However, there are always added risks from the mating of closely related persons and those risks are not negligible.
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Kinship because of common ancestry. SEE ALSO: relationship. [L. consanguinitas, blood relationship]

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relationship by blood; the sharing of a common ancestor within a few generations.

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con·san·guin·i·ty (kon″sang-gwinґĭ-te) [L. consanguinitas] kinship; relationship by blood.

Medical dictionary. 2011.


Look at other dictionaries:

  • Consanguinity —     Consanguinity (in Canon Law)     † Catholic Encyclopedia ► Consanguinity (in Canon Law)     Consanguinity is a diriment impediment of marriage as far as the fourth degree of kinship inclusive. The term consanguinity here means, within certain …   Catholic encyclopedia

  • consanguinity — con·san·guin·i·ty /ˌkän ˌsan gwi nə tē, ˌsaŋ / n: the quality or state of being consanguineous Merriam Webster’s Dictionary of Law. Merriam Webster. 1996. consanguinity …   Law dictionary

  • Consanguinity — Con san*guin i*ty, n. [L. consanguinitas: cf. F. consanguintit[ e].] The relation of persons by blood, in distinction from affinity or relation by marriage; blood relationship; as, lineal consanguinity; collateral consanguinity. [1913 Webster]… …   The Collaborative International Dictionary of English

  • consanguinity) — consanguinity). См. коэффициент родства. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • consanguinity — consanguinity. См. кровосмешение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • consanguinity — c.1400, from M.Fr. consanguinité, from L. consanguinitatem (nom. consanguinitas), from consanguineus consanguineous, of the same blood, from com together (see COM (Cf. com )) + sanguineus of blood (see SANGUINE (Cf. sanguine)) …   Etymology dictionary

  • consanguinity — [n] family relationship affiliation, affinity, agnate, blood relationship, brotherhood, cognate, connection, family tie, filiation, kin, kindred, kindredship, kinship, lineage, race, sisterhood, strain; concepts 296,388 …   New thesaurus

  • consanguinity — [kän΄saŋ gwin′ə tē, kän΄sangwin′ə tē] n. [ME & OFr consanguinite < L consanguinitas: see CONSANGUINEOUS] 1. relationship by descent from the same ancestor; blood relationship: distinguished from AFFINITY 2. close association; connection …   English World dictionary

  • Consanguinity — Bernard Gui s Arbor genealogiae regum Francorum, showing consanguinity of the kings of France Consanguinity ( con (with/together) sanguine (blood) ity (no …   Wikipedia

  • consanguinity — /kon sang gwin i tee/, n. 1. relationship by descent from a common ancestor; kinship (distinguished from affinity). 2. close relationship or connection. [1350 1400; ME consanguinite ( < AF) < L consanguinitas. See CONSANGUINEOUS, ITY] * * * ▪… …   Universalium

  • Consanguinity — (Roget s Thesaurus) >Relations of kindred. < N PARAG:Consanguinity >N GRP: N 1 Sgm: N 1 consanguinity consanguinity relationship kindred blood Sgm: N 1 parentage parentage &c.(paternity) 166 Sgm: N 1 filiation filiation affiliation …   English dictionary for students