At the cellular level, genes are made of DNA, which is the genetic blueprint for growth and development. When DNA is replicated and undergoes cell division, there may be errors, known as mutations that occur. After multiple generations of offspring are produced, eventually the mutations will change enough to show a new distinguishable trait such as disease or a particular disorder (Ovchinnikov, Rubin & Swergold, 2002). If the same genes are passed on and carry the traits for a particular disorder, then fitness of the host will be lowered, because of the impact of a certain disease. An example would be cystic fibrosis, which develops ...
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