an environmental angent that changes DNA. APEX
A neutral mutation is a mutation that has no effect on the body. It is an alteration in the DNA sequence that is neither beneficial nor detrimental to an organism's ability to survive and procreate.
changes in the DNA sequence
Mutation usually causes the entire base sequence to defect. This usually happens during the protein synthesis.
The Norwalk virus (Norovirus) does not have a lyosgenic cycle. It does not remain dormant as lysogenic viruses can.
frameshift mutation