Question

Under which circumstances would an error during DNA replication be most

likely to cause genetic variation?
A. The error prevents the parent cell from completing its cell cycle.
OB. The error occurs in a gamete and the resulting offspring survives.
C. The error is so minor that the cell can still fully function.
D. The error occurs early in development and causes observable
changes in the organism.

Answer 1

During DNA synthesis, most DNA polymerases "check their work," fixing the majority of mispaired bases in a process called proofreading. Immediately after DNA synthesis, any remaining mispaired bases can be detected and replaced in a process called mismatch repair.