Remember the amount of alleles we're all made of may be a set amount of types, but the actual formation is beyond count, the varying sequences could match past ancestors on different levels such as dominant and resessive genes however it's the genetic sequencial structure in the brain along with other impacting factors that would be directly linked to memory. Basically even if your brain was a trace copy of an ancestors, modern brain stimulus during growth and expansion would be over writing it in order to adapt to its environment becoming a different version all together. In other words you are your code, even if you are reformed it will be as a baby and you will not know of anything till your brain forms, including yourself and surroundings..
