31.   And so, although the bubonic plague began in Asia, the HIV resistance gene is not there.

32.   And knowing which gene is at fault can be a mixed blessing.

33.   And the genes are impossible to ignore.

34.   And the third gene was one that causes the cell to make an enzyme called telomerase.

35.   And then there are genes.

36.   And the gene for blue is like charisma.

37.   And, he said, it also suggests that the AIDS resistance gene is in the population for a reason.

38.   And, they find, this AIDS resistance gene is astonishingly common in people whose ancestors lived in areas of Europe that were ravaged by the plague.

39.   As long as a control spot on the DNA at the front of a gene is empty, the gene is inactive.

40.   At the same time, genes are being found that influence not only physical traits like hair color and height but also some aspects of human behavior.