101.   Gilbert has used extensive computer and statistical analysis to map out a theory on what the first genes were like.

102.   Greenberg and Ms. Brown next showed that in normal mice, the fosB gene is active in a part of the brain that controls nurturing.

103.   Hamer cautioned that the X-linked gene was just one of many contributors to sexual orientation.

104.   He is using a powerful computer to analyze the DNA in those tissues to see which genes are active in cancer cells but not in normal cells.

105.   He and his colleagues tallied human genes by matching them to their counterparts in the puffer fish, where genes are easier to count.

106.   His study of New England centenarians showed that good genes were increasingly important in the oldest decades.

107.   His genes are valuable to the North American captive gorilla population, Woodland Park Zoo officials said.

108.   I remain doubtful that identifying character genes can be helpful to our society.

109.   How many human genes are there?

110.   If the gene for this enzyme is defective, the result is a person with albinism, someone who makes no melanin at all.