Genes define humans and are passed from parents to children. DNA is found in all living creatures, not just human beings. Why is it important to study DNA? Because we can use this knowledge to understand how diseases occur and function. And diseases occur because our DNA is subject to changes and different mutations which are triggered by viruses, chemicals UV radiation, and other factors. We know that mutations cause diseases such as color blindness, sickle cell anemia, and cystic fibrosis. But DNA may be the key to immortality. And according to some scientists, technological advances will help us to build new organs and tissues, treat illnesses, and reprogram our DNA code.
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