21.   One gene can make more than one protein.

22.   Other genes make factors that act as master switches, turning yet other genes on and off at particular points in development.

23.   Proteins are made by genes.

24.   Proteomics involves the large-scale study of the proteins that are made by genes.

25.   Researchers believe having one copy of the gene may make them extra susceptible to cancer and extremely sensitive to radiation.

26.   Scientifically altered genes make it possible boost crop output, use fewer pesticides, or grow crops in regions with scarce water or poor soil.

27.   Some researchers say the genes make a protein that hears commands for the cancer cell to grow.

28.   So one gene can make more than one protein.

29.   Spinning stories of how Neanderthal genes make us think and act the way we do undeniably makes for a lively parlor game.

30.   That gene makes the altered cells resistant to the anticancer drug methotrexate.