There is a coefficient of inbreeding and coefficient of relationship), which allows calculating the probability of homozygosity based on ancestry, or inferring the presence of consanguinity from the degree of homozygosity, which can be identified in the SNP arrays (runs of homozygosity). This can lead to the unmasking of incestuous and abusive relationships.
Schaaf C, Scott D, Wiszniewska J, Beaudet A. Identification of incestuous parental relationships by SNP-based DNA microarrays. The Lancet [Internet]. 2011 [cited 2021 Apr 18];377(9765):555–6. Available from: https://linkinghub.elsevier.com/retrieve/pii/S0140673611602018
Countries with more consanguinity.
Consanguinity is higher in those countries that practice inbreeding. The result is an increase in homozygosity, and as a consequence, a higher prevalence of diseases. autosomal recessive.
The regions of homozygosity (ROH) are the genetic result of consanguinity, and can be studied using genetic techniques such as the SNP array. The inbreeding coefficient is directly correlated with the number of homozygosity tracts in a genome.
Sund KL, Zimmerman SL, Thomas C, Mitchell AL, Prada CE, Grote L, et al. Regions of homozygosity identified by SNP microarray analysis aid in the diagnosis of autosomal recessive disease and incidentally detect parental blood relationships. Genet Med [Internet]. 2013 January [cited 2016 Sept 29];15(1):70–8. Available from: http://www.nature.com/gim/journal/v15/n1/full/gim201294a.html
Alvarez G, Ceballos FC, Quinteiro C. The role of inbreeding in the extinction of a European royal dynasty. Bauchet M, editor. PLOS One [Internet]. 2009 Apr 15 [cited 2026 Mar 22];4(4):e5174. Available from: https://dx.plos.org/10.1371/journal.pone.0005174