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DNA identification of monozygotic twins

鉴定(生物学) 遗传学 生物 DNA 计算生物学 进化生物学 植物
作者
Hsiao‐Lin Hwa,Chun-Yen Lin,Yu‐Jen Yu,Adrian Linacre,Lee Jc
出处
期刊:Forensic Science International-genetics [Elsevier]
卷期号:69: 102998-102998 被引量:2
标识
DOI:10.1016/j.fsigen.2023.102998
摘要

This study details the differentiation of identical twins based on single mutational base differences. There were three pairs of male monozygotic (MZ) twins in this study. DNA samples from blood, a buccal swab or saliva from each individual were all initially genotyped using 22 autosomal STR and 27 Y-STR loci. Preliminary screening confirmed there were no differences in the STR data between each pair of MZ twins. Whole Genome Sequence (WGS) data were generated from DNA extracted from the three body fluids from each individual. Kinship coefficients with 0.4254, 0.4557 and 0.4543 from 3 twins were generated based on WGS data to further confirm that their relationship was that of MZ twins. The fastq data generated by the Illumina Hiseq 2000 between MZ twins were then treated as "normal" as opposed to "tumor" using commercially available software tools to identify mutational single base changes. Sanger DNA sequencing confirmed there were 1, 5 and 9 single base changes found in WGS data from each of the three MZ twin sets. There was individual variation in the mutational base changes when comparing data from the three body fluids. The methods used in this study to differentiate MZ twins based on WGS data can readily be performed in many operational forensic DNA laboratories using user friendly software.
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