Putting DNA to Work
  INHERITED DISEASES

What Are Mutations?

1 2 3 4 5 6


Because A, T, G, and C are letters in the genetic alphabet, changing one letter for another can change the meaning of a gene. Just as “time” changes to “tame” when one letter changes, a single nucleotide change in a gene may sometimes cause disease.

Since many genes govern the fundamental structure and chemical processes of life, defects in their instructions can potentially interfere with the chemical interactions that control an organism’s growth and health. However, most mutations that are passed on from generation to generation occur in the long stretches of DNA in between the parts of genes that carry instructions, where they do not harm the person.

There are many different ways that a gene can be mutated. Examples are shown below using the sentence "Time To Dream."
Graphic of different types of mutations


1 2 3 4 5 6
Hemochromatosis [ next ]