I am new to Admixture and I would like to use fastNGSadmix to look for admixture in one individual (modern). Admixture is supposed to look for proportions of ancestral populations in a sample (either a population or an individual sample). for that I will need to prepare my reference population set to compare with my actual sample which is an individual form region X for instance.
Now I am thinking whether I have to add the X population to my reference set or not? If yes, wouldn't it introduce bias? Like my individual will always show the X population as the first admixing population?