Science Daily: Which of the two DNA strands is damaged influences the cell's mutation profile
Which of the two DNA strands is damaged influences the cell's mutation profile
A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. [1] . Mutations result from errors during replication, mitosis, meiosis, or damage to DNA, which then may trigger error-prone repair [2] or cause an error during replication (translesion synthesis).
We often refer to a mutation as a thing—the genetic variation itself. This approach can be useful when it comes to a gene associated with a disease: the disease allele carries a mutation, a DNA change that compromises the protein's function.
A mutation is a change in the sequence of DNA, the molecular instruction manual inside your cells. It can be as small as a single letter of genetic code swapping for another, or as large as an entire chunk of DNA being deleted or rearranged.
Mutation is a permanent change in the DNA sequence of a gene or chromosome, which can result from errors in replication or environmental factors and can affect an organism’s traits.
A genetic mutation is an alteration in the genetic code found in DNA. Mutations can be harmful, neutral, or helpful and play a role in evolution.