Less variety in your DNA can increase your chances for getting rare genetic diseases. You may have heard of some of these diseases: albinism, cystic fibrosis, hemophilia and so on.
Less variety in your DNA can also make you unhealthy in another way – it can weaken your immune system so you can’t fight off diseases as well. You can end up a very sickly person!
Now of course inbreeding doesn’t mean you will definitely get a genetic disease or wind up sickly. You are just more likely to have health problems. And the more inbreeding, the greater the risk.
Many communities are inbred Charles Darwin came from a inbred family and had inbred children he believed that he was superior to commoners and set the example that many people follow. Ask any doctor if inbreeding is a good idea?
It is still being practised worldwide and many religions insist on people marrying within their religions. Ancestry.com told me that we have a world problem.
The United Nations says everyone has the right to chose their own partner?