They can also appear spontaneously during the replication of DNA. Mutations generally fall into two types: point mutations and chromosomal aberrations. In point mutations, one base pair is changed.

Insertions and deletions are two other types of mutations that can affect cells at the gene level. An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication.

There are many different types of mutations which can arise in DNA. This diagram shows the normal order of the bases for one of the strands in a DNA molecule. Only one of the strands of DNA is ...

DNA contains genes that carry instructions for the manufacture of a protein. If a mutation occurs in a gene that results in a change to the sequence of DNA bases, then the structure of the protein ...

While most known types of DNA damage are fixed by our cells ... DNA damage is distinct from a mutation. While a mutation is one of the standard four DNA bases (A, G, T or C) in the wrong place ...

A new mega-database of half a million mutations may flag new ways of treating genetic disease, scientists say.

While most known types of DNA damage are fixed by our cells ... DNA damage is distinct from a mutation. While a mutation is one of the standard four DNA bases (A, G, T or C) in the wrong place ...

and very rarely with other types of pituitary adenomas. Childhood or young adult onset patients usually with acromegaly can also have mutations in the AIP gene without a known family history of ...