I think you need a geneticist here. Clearly they must have mathematical numbers outling the probability of certain genetic outcomes. I have only studied older history, so i can't help you further. My historical studies ended at the hardy-weinberg principle
There are different examples of this in social science literature which address questions about biological determinism in different disciplines. For example see these articles in a special issue on biological determinism fro Annals of Political and Social Science:
Graves, Joseph L. "Great Is Their Sin Biological Determinism in the Age of Genomics." The ANNALS of the American Academy of Political and Social Science 661, no. 1 (2015): 24-50.
Byrd, W. Carson, and Matthew W. Hughey. "Biological Determinism and Racial Essentialism The Ideological Double Helix of Racial Inequality." The ANNALS of the American Academy of Political and Social Science 661, no. 1 (2015): 8-22.
Moffitt, Terrie E., and Amber Beckley. "Abandon twin research? Embrace epigenetic research? Premature advice for criminologists." Criminology 53, no. 1 (2015): 121-126.
http://ccj.sagepub.com/content/32/1/7.short
This is an important issue in criminology because explanations of crime can be perceived as including racially biased assumptions through the use of biologically deterministic arguments.