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DNA Changes From Point Mutations to UV Damage
Description
Mutations are changes in the DNA sequence. They can happen by chance during DNA copying, or they can be caused by environmental factors such as radiation and chemicals. Scientists also describe mutations by how much DNA they affect, how they change a protein, and whether they happen in body cells or germline cells.
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Transcript
Des mutations ponctuelles,où un seul nucléotide est changé,peuvent produire une protéine qui est tout à fait normaleou complètement non-fonctionnelle, selon le type. Il s'agit notamment de silence, de faux-sens,de non-sens, et de mutations de décalage. Les mutations silencieuses, comme le nom l'indique,n'ont aucun effet sur la séquenced'acides...
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