First Steps Toward An Epigenetic Clock To Measure Biological Aging Instead Of Mere Chronological Aging

Scientists Discover New Biological Clock With Age-Measuring Potential  by Melanie Haiken.  Forbes.  October 21, 2013.

(1)  This "epigenetic clock" measures the natural process by which _________________________.

(2)  Women's breast tissues _______________________.

(3)  The researchers believe that they have produced a "first-ever _________________ across most tissues and cell types."

(4)  Another method of age prediction is based upon __________ length.

(5)  Comparing the ages of different tissues and organs in the same individual could spur a search for an __________________.