BLA1374

from lecture to media news its been stated that too much or too little chromosome
causes down syndrome, and that life expectancy is only about 40 years although for personal experience we have a causing in which he will be 51 years of age, how is this approve or support the scientific findings or to have actual data the mother and son was also young when he was conceived. So what happended? HGD Chp3 pg 57 Barretts law # 10