Have data from 23andMe or Ancestry? Make a report automatically with Promethease !

Identity by descent

From SNPedia

Identity by descent

Two or more alleles are be identical by descent (IBD) if they have been inherited from the same ancestral allele without recombination events. A common way to identify alleles as identical by descent is usually carried using SNP data. If enough SNPs in two alleles are the observed as the same, then the two alleles are inferred as IBD.

See also half-identical region