The DNA replication is a biological procedure which happens in all living organisms and copies their DNA; it is the basis for biological inheritance. The process will starts when one double-stranded DNA molecule generates two identical copies of the molecule. Cell cycle mitosis also pertains to the DNA replication or reproduction process. The cell cycle involves interphase, prophase, metaphase, anaphase and telophase. Each strand of the original double-stranded DNA molecule serves as sample for the production of the complementary strand a procedure referred to as semiconservative repetition. The Cellular proofreading and error toe-checking mechanisms make sure near ideal fidelity for DNA replication.