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 test is commonly used where an alleged father is not available for testing but his sibling (brother or sister) is. The Aunt or Uncle DNA Testing kit can determine with 100% accuracy, up to a 99.99% positive proof of relationship or 100% exclusion. The Aunt/Uncle DNA Test. 1  Conclusive Range: 2  Turnaround Time: 5-10 Business Days. 3  Participants: One alleged aunt or uncle, one niece or nephew.