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.
Shay, IDENTIGENE recommends that you send off your DNA within 6 months of collection. If your samples are older than 6 months, we ask that you contact our client support staff so that they are aware of your situation. If the laboratory cannot pull DNA from the swabs, they will contact you for a retest.