Health: In high school they teach the 3 laws of Mendel. (That’s Not Mendel the Mouse.)
So things can change from generation to another
Health, here is the list of all the PROVEN GENETIC Retardation:
Down Syndrome, Fragile X, Rett Syndrome, Williams Syndrome, Angelman Syndrome, Prader Willi Syndrome, Patau Syndrome, Edwards Syndrome, Cohen Syndrome
The Rate for Genetic Retardation is 1:10,000 except for Down Syndrome which is 1:1,000
AND THIS RATE HAS NOT CHANGED!
But Autism which is NOT proven to be Genetic (there is no blood test) has gone from
1:10,000 to 1:50!
Which is EVIDENCE that Autism is NOT Genetic!
And this is not MY opinion but the opinion of real PhD SCIENTISTS!