The bird may fight off some viruses, ones with certain mutations.

Specific diseases are associated with mutations in some of these genes.

This is one of the steps that causes cancer in combination with other mutations.

"And you've had extensive experience with mutations," she pointed out.

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

And with mutations, there might have been a lot of factors.

It can be associated with mutations affecting the cohesin complex.

Some cases of schizophrenia, the researchers suggested, might be associated with similar mutations.

Babies die, born with mutations that could not support life.

Women at high risk include those with a strong family history of breast cancer or genetic mutations linked to the disease.