DNA is nucleic acid that contains the genetic instruction for the development and function of living things. In biology the genome of an organism is its whole hereditary information and is encoded in the DNA.
Using the above information; I have this thinking , my thinking only, about human health and the future of humans. Thinking about that which we inherit. I am in the process of reading a biography of Charles Darwin and his research and thinking about changes in species. This triggered my ideas about the inherited health of mammals. This is thinking about how poor heath is dealt with through generations. This does not include person to person diseases that are transmitted between people, only the health or lack of health that is inherited.
If a person dies before puberty of an inherited bad genome that caused the death, those traits are not passed to future generations. Consequently, children have very few of these. The people that are left can have unwelcome genomes that show up in diseases later in life. The conditions that cause death in earlier adulthood, before the end of the child bearing years, are sometimes passed to future generations. Therefore, younger adults have more deaths from bad genomes than children.
It all adds up to the fact that older people get most all of the fatal diseases. Their isn’t any way to procreate them out system. Those that survive into the older generation still have those bad genomes. Also, those older individuals that do not have the defects cannot procreate their good genes to future generations. There is much hope that the recent research with genomes can do what natural selection can not do for the future generations. That is, identify those who have the defects and find ways to eliminate them from the person’s genes. That leaves us dying from old age and that is, I understand, the only disease we have conquered . Who is to say that life is not a complicated process?