This can be used to discover the function of an unknown gene, any genetic interactions that occur or where the gene is expressed.

In addition, known genes may be more highly expressed than unknown genes, which presumably aided their initial identification and characterization.

Suppose you are a geneticist studying an unknown gene.

About half of hereditary breast-ovarian cancer syndromes involve unknown genes.

Other currently unknown genes may be involved as well.

Reverse genetics is a powerful tool to study and characterize the previously unknown viral genes.

The name is also linked to the "X-Gene," an unknown gene that causes the mutant evolution.

Only vague speculations were offered about the probability of several different unknown genes' playing a part.

This led to the discovery of an unknown gene.

With conventional breeding, thousands of unknown genes are transferred in order to get the one with the desired trait.