Sometimes the genes of the retrovirus do not express their information immediately.

A recent study has shown that the use of particular drugs may reactivate genes normally expressed only during hair cell development.

A gene expressed by cells in the primitive streak during germ line development.

Not only are there many interacting genes, but genes sometimes do not express themselves fully, or conflict with one another.

Did the extra gene express itself in any altered structure or metabolism of the brain?

The genes express themselves in many ways.

In the absence of an adverse environment, however, the gene doesn't express itself in this way.

Understanding how these genes express themselves will provide clues to how diseases are caused.

The young boar inherited the gene that scientists inserted into its father, and the gene expressed itself.

There are literally billions of different ways the genes from one pair of parents can express themselves.