How is the sea of electrons model is used to explain the physical properties of metals? electrons give off a charge, the greater or lesser the metal will depend on how packed the universe is in the metal, atoms and such.
Mutations can also be caused by exposure to specific chemicals or radiation. These agents cause the DNA to break down. This is not necessarily unnatural  even in the most isolated and pristine environments, DNA breaks down. Nevertheless, when the cell repairs the DNA, it might not do a perfect job of the repair.
Other genetic mutations occur due to damage caused to the DNA sequences by lifestyle or environmental factors. Our cells have built in mechanisms that catch and repair most of the changes that occur during DNA replication or from environmental damage.ow Do Genetic Mutations Occur. 03 May, 2011 how do 0. A mutation is a permanent change in the DNA sequence of a gene. Genetic mutations are those that are passed on from a parent to a child and through families or are acquired during a personâs lifetime.