An example of a polygenic trait is human skin color variation. Several genes factor into determining a person's natural skin color, so modifying only one of those genes can change skin color slightly or in some cases, such as for SLC24A5, moderately.
Case 1 â The Alleged Father has Recently Passed Away. If less than a week has passed since the deceased died, then if permission can be obtained, fingernail cuttings and a hair sample with root attached can be used to extract DNA samples to establish paternity. It is a more complex procedure than a buccal swab, but the DNA matching is just as accurate.
There are two types of aunt/uncle tests available from TestDiagnostics a peace of mind aunt/uncle DNA test or a court approved aunt/uncle DNA test. If you are looking to take a test for your own concerns, you can take a peace of mind aunt/uncle test. This test cannot be used in a court of law or for visa or immigration purposes, but is meant to give you peace of mind in the privacy of your home for any proof of relationship concerns you may have.