<em>PCR is a technique used to create many copies (amplify) of small segments of DNA.</em> In order to achieve first, the <em>DNA must be denaturalized with heat forming two strands that will serve as templates for the Taq polymerase, an enzyme that will duplicate de original DNA. This cycle is repeated 30 to 40 times to get as many copies as possible.</em>
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Explanation:according to a recent census in the US, only five percent of elderly people (65 years plus) live in homes, nursing houses, retirement places ecetera. Which is a lot less than one would believe.