It is not yet clear just how complex these networks of gene activity are.

The epigenetic landscape is a representation of changing gene activity.

Knowledge of the pattern of gene activity is still very limited.

However, differences that arise directly from gene activity have also been observed.

Changes in gene activity may also occur well before other more visible symptoms of harm, like tumors, which can take months to develop.

The problem is a lack of understanding of the normal regulation of gene activity in the body.

Altering transcription rates is an effective strategy for regulating gene activity.

Nor could scientists detect any differences in the pattern of gene activity between people with Huntington's and those without the disease.

Such techniques permit scientists to test for gene activity and enzyme function throughout an organism.

Antimorphs are dominant mutations that act in opposition to normal gene activity.