How does semi conservative replication help prevent mutations during dna replication

The rule of complimentary base pairing is strictly followed when complimentary stand is synthesized.

Explanation:

During the semi-conservative replication of DNA, the one strand of the original DNA molecule is kept safe and a new strand is synthesized with the help of free nucleotides present there. During the formation of new strand on the original strand, the rule of complimentary base pairing is strictly followed and the nucleotides join to form the new stand according to this rule. Due to this there is less chance that a wrong base pairing will occur and in this way the new stand is formed complimentary to the original strand is free from any mutations.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."