Question

How does semi-conservative replication help prevent mutations during DNA replications?

Answer 1

This is true because one half of the DNA is the original so there is less room for error. 

Answer 2

DNA replication is the process by which two DNA molecules are produced from one parent DNA molecule. DNA replication is semi conservative, this implies that, each strand in the double helix DNA molecule act as a template for the synthesis of a new, complimentary DNA strand. Because semi conservative method has a DNA template that is already accurately formed, the probability of having errors in the newly formed strand is drastically reduced.