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.
A. Forensic examinations are usually performed within 24 to 48 hours after the death is reported. Therefore, the deceased can be removed from the Coronerâs Office immediately after the examination unless the case is a homicide. Homicides are held 24 hours after the autopsy before they are released.