Smallville (2001)

1 corrected entry in Lineage

Lineage - S2-E7

Corrected entry: Clark brings Pete along when he retrieves the DNA sample taken from him so that he can use his DNA to replace his. However, Pete is African American in origin and it would show in his DNA when they try to analyze it. Using Pete as a substitute DNA donor would cause further alarm because Clark is white but the DNA sample which was supposedly taken from him would result in someone of African American in origin.

Correction: There are no reliable DNA markers that can determine someone's skin color. It can give a probability of a person's origin being from a certain geographical region but it doesn't tell you if someone is black or white.