Mathews County, Virginia (VA) County population in 2014: 8,836 (all rural); it was 9,207 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 1,781. County owner-occupied free and clear houses and condos in 2010: 1,459. County owner-occupied houses and condos in 2000: 3,329.
DNA makes copies of itself through the process of replication.  Because the nucleotide bases are complementary, they automatically  make the other strand of complementary ba â¦ ses when the division of  the cell occurs.
New DNA molecules are made by copying, using old DNA molecules as a template. Our understanding of this process also goes back to Watson and Crick's observation that only certain base pairings can exist in DNA. Each DNA strand contains the information necessary to reconstruct the other, or complementary, strand. When a cell needs to copy a DNA molecule, it unzips part of the double helix, breaking the rungs of the ladder in half so that the molecule separates down the middle. New nucleotides, floating free in the cell, can then hook up with complementary nucleotides along each strand. Gradually the unzipping proceeds, and the new strands continue to grow until one DNA molecule becomes two identical DNA molecules. A cell copies all of its DNA in this fashion each time it divides.