I guess so

Yes it does...we are what we consume.what we take for a prolonged period will not only affect our metabolism and but can also mutate our genes.so a mutated gene is ganna be transferred with the sperm or the egg and the child is ganna have a mutated or abnormal DNA.. And also...if it's the mother that consumes the chemicals and the drug it has a direct effect on the child.you can google it.the baby's development inside his mother's womb is directly affected by the mother's lifestyle.

Ofcourse wouldnt it tamper with our DNA, prolonged addictions have an effect on your braincells and sperm count