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.
The Blog. You can get Paternity Testing even if the father is deceased. Unfortunately, in the DNA testing community we do come across a few clients who need a test, but do not have access to the father because they have passed away. If this is the case, it is not as difficult as it sounds. There are two ways this can be done.