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.
They also have a patent pending on a process to bind the DNA to a substance which can be stored at room temperature indefinitely. A number of Funeral Homes in Canada and the US are currently using DNA Memorial. There are many other DNA storage companies that partner with Funeral Homes around the world.