31.   One is the effort to measure how genetic variation is distributed around the globe, information that will help track prehistoric human migrations.

32.   Some have blamed diet and other lifestyle factors, race-based genetic variation, environmental exposure to toxins and inequitable cancer screening and treatment.

33.   Since the genetic variations are not found in all redheads, he said, the search for other genetic factors for redheadedness most continue.

34.   Some have suggested the species was vulnerable to extinction because of a lack of genetic variation.

35.   The analysis shows that certain genetic variations alter the effectiveness of cholesterol-lowering drugs such as Lipitor, Pravachol, and Zocol.

36.   The effort includes a captive breeding and rearing program for each genetic variation to repopulate its native island.

37.   The most important and admittedly disputatious point in their new theory, the scientists said, is that such variations in behaviors need not imply underlying genetic variations.

38.   The other major use of snips is in tracing the genetic variations that contribute to health and disease.

39.   These one unit changes are known as single nucleotide polymorphisms, or SNPs, and are a principal source of human genetic variation.

40.   These single unit changes are called single nucleotide polymorphisms, or SNPs, and account for a large proportion of human genetic variation.