The little tips of chromosomes get shorter every time a cell divides, and this shortening is a mark of cellular aging. (scientificamerican.com)
Hamer demonstrated this by noting that 33 out of 40 pairs of homosexual brothers whom he studied showed the same variation in the tip of the chromosome. (religion.blogs.cnn.com)
Researchers from several institutions, including, UCLA, Boston University, Stanford University and the Institute for Aging Research at Hebrew SeniorLife, analyzed blood samples from nearly 10,000 people to find that genetic markers in the gene responsible for keeping telomeres (tips of chromosomes) youthfully longer, did not translate into a younger biologic age as measured by changes in proteins coating the DNA. (sciencedaily.com)