11.   For all the hope raised by the discovery, researchers said that the genes do not make a person AIDS-proof.

12.   For example, our genes make us adapted to live in tropical climates and yet, we have colonized the whole planet.

13.   For instance, women whose genes make them susceptible to breast cancer might receive insurance if they agreed to follow risk-reducing treatments.

14.   However, the way in which the genes made proteins was flawed and unstable.

15.   If anything, it intensifies the challenge, because the gene mappers showed that many human genes make several proteins.

16.   If you think about it, cognitive function depends on neurochemical processes in the brain, which are influenced by enzymes, which are made by genes.

17.   It is a central dogma of genetics that each gene makes one protein.

18.   Like all genes, the Mest gene makes a single protein.

19.   No one knows if tree genes make a difference.

20.   Nor did they prove that the gene makes fat people grow even fatter.