To begin with, this was the only such pattern in existence, but then a new mutation arose.

Get out of this area to put a stop to new mutations.

Not all patients will have a positive family history of the disorder, new mutations do occur.

For example, a butterfly may produce offspring with new mutations.

New findings show that each human has on average 60 new mutations compared to their parents.

Other cases may result from new mutations in the gene.

Approximately 30% of patients have no family history; their disease is presumably caused by new mutations.

They're a new mutation; I had them brought all the way from the far side.

An increased parental age may play a role in the development of new mutations and abnormalities.

A small number of infants will have a new mutation not present in their mothers.