1.   And how do genes contribute to complex behaviors such as personality?

2.   And they should enable medical geneticists to trace elusive links between genes and disease, particularly the common diseases to which many genes contribute.

3.   At least nine genes contribute to insulin-dependent diabetes in mice, he said in a telephone interview.

4.   Biologists do not yet know exactly how the gene contributes to creating the faculty of speech and language.

5.   Actually, however, the results of the new effort will not immediately be information on which genes contribute to disease.

6.   Figuring out which genes contribute to disease could help in developing drugs.

7.   In that disease, many genes also contribute to the deposition of fatty plaques within artery walls, in combination with environmental factors.

8.   It is believed many genes contribute to such diseases, with each one having a small effect.

9.   Scientists have expressed puzzlement at research suggesting that genes contribute relatively little to overall longevity, despite the widespread perception that longevity runs in families.

10.   As many as a hundred genes could contribute to epilepsy and play a role in other neurological problems, Walsh said.