*Me am from poal me use neanderthal technique to determine if child is mine.* I love my freedom of speech but always remember that it includes freedom to say stupid shit. You carry with you the refined genetic code of your entire lineage and old traits even ones that haven't been seen in multiple generations can show up in your children. The distribution and balance of certain hormones during pregnancy will also influence which dominant genes and recessive ones get "chosen" in the genetic "lottery". <simplified It's not technically random chance or a lottery but random is just a concept humans made up to dismissively explain things that rely on so many thousands upon thousands of small pieces of information that contribute to a single result that it is impossible to process in its entirety with a human mind.