Deoxyribonucleic Acid is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses.

Deoxyribonucleic Acid is a nucleic acid that contains the genetic instructions for the development and function of living things.

DNA replication is the process of producing two identical replicas from one original DNA molecule. This biological process occurs in all living organisms and is the basis for biological inheritance.

Hereditary traits, like eye color, nose shape and height, are passed on from parent to offspring through genes in the DNA. This takes place post fertilization, during the meiosis process. The genes of one parent are mixed with the genes of the other or the exact copy of the DNA is replicated.

When a cell makes a protein the instructions are copied from part of the DNA strand and transcribed to a new molecule, called RNA.

RNA (Ribonucleic acid) a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins, although in some viruses RNA rather than DNA carries the genetic information.

• mRNA or Messenger RNA
  mRNA transcribes the genetic code from DNA into a form that can be read and used to make proteins. mRNA carries genetic information from the nucleus to the cytoplasm of a cell.

• rRNA or Ribosomal RNA
  rRNA is located in the cytoplasm of a cell, where ribosomes are found. rRNA directs the translation of mRNA into proteins.

• tRNA or Transfer RNA
  Like rRNA, tRNA is located in the cellular cytoplasm and is involved in protein synthesis. Transfer RNA brings or transfers amino acids to the ribosome that correspond to each three-nucleotide codon of rRNA. The amino acids then can be joined together and processed to make polypeptides and proteins.