The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions.
(July 2010). Molecular anthropology is a field of anthropology in which molecular analysis is used to determine evolutionary links between ancient and modern human populations, as well as between contemporary species.itochondrial DNA offers another advantage over autosomal DNA. There are generally 2 to 4 copies of each chromosome in each cell (1 to 2 from each parent chromosome). For mtDNA there can be dozens to hundreds in each cell.
Extracting DNA involves a series of steps to gently break open the cell, break open the nuclear membrane, separate the DNA from proteins and then cause it to precipitate out of a solution.This is accomplished using various chemicals, based on the structure of membranes, DNA and its electronegativity.Sodium chloride, or other sodium-containing compounds, are used to stabilize the DNA after it has been stripped of its proteins and aid in precipitation.o recover DNA for further testing or visualization, the DNA must be precipitated out of a solution with water. Since water has a relatively weak positive charge, this is accomplished by providing a stronger positively charged ion in the solution. Sodium is the perfect candidate for this.