Genes and Chromosomes:

The gene is a distinct portion of a cell's DNA. Genes are coded instructions for making everything the body requires, mainly proteins. Human beings have about 25,000 genes. Researchers have discovered what some of our genes do and have found some which are related with disorders like as cystic fibrosis or Huntington's disease. There are, though, several genes whose functions are still unknown.

Genes are packaged in bundles known as chromosomes. Humans have 23 pairs of chromosomes for a total of 46. Of those, 1 pair is the sex chromosomes determines whether you are male or female, plus some other body characteristics, and the other 22 pairs are autosomal chromosomes determine the rest of the body's makeup.