12th May 2005, 1:07 AM
Quote:Well, there are a number of genes that can't be passed on due to their very nature as well. Think of progeria (nature's CRUELEST joke!). It's advanced aging disease that kills children by making them age to death by roughly 8 to 12 years old. They don't reproduce, but progeria shows up, and it's genetic. Why? Well, there's one key thing about genetics to keep in mind. Recessive traits. Then, combined recessive traits that can thus express themselves. Need I say more?
Yes. As I said, there are plenty of genetic diseases that kill young... Cystic Fibrosis would be another example.