identical by descent

identical by descent

said of all genes which are copies of the same segment of DNA.
References in periodicals archive ?
0302 identical by descent with their sibling proband and is similar to a 20% risk for those DR3/DR4-[DQB1.
T1D or those who have the HLA-DR3/DR4-DQ8 genotype inherited identical by descent with a sibling proband; such siblings have T1D risk as high as 80% (13).