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Relatives Identification
Sibling DNA testing
Sibling DNA Testing to determine the relationship between two persons is utilized often when the father, mother or other relatives are not available for providing their genetic material for testing. Two modes of testing are possible: namely full-siblingship testing and half-siblingship testing. The former could determine whether the two persons under test have the same parents while the latter could determine whether they share one of the parents.
Grand parentage testing
Grand Parentage Testing is another means to prove the relationships between parents and children. In cases when the parents are not available for DNA testing, DNA from the children’s grandparents could be used for this purpose. The principle is that the grandfather, father and the son should possess the same paternal genetic markers as one generation passes the Y-chromosome to the next. Thus, it makes no difference whether we test the father’s or the grandfather’s chromosome to see how well the data matches with that of the children.
1st Cousin analysis
This analysis could be used to determine whether two people under test are first cousins.
Twin zygosity DNA testing
This test could be used to identify whether a pair of twins is identical or fraternal. Identical twins inherit exactly the same genetic material from both parents and their DNA testing result should be the same. If differences are found in the DNA profiles of a pair of twins, it could be concluded that they are fraternal.
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