Different Results From Different Companies

One company said that they did not carry a gene that is associated with red hair. The other company they sent their spit off to, said that they did. What does this tell us? One of the companies was analyzing variants of the gene that code for red hair.
What is the second concern? The Genome Wide Association Studies determine the positions of interest in DNA. When using a group of as many people as possible who have a shared trait such as red hair…