Depending on the title, there may be more or fewer duties required for the position. While smaller offices may have office assistants perform the duties of secretaries or file clerks, larger offices might have their assistants stick to one duty, such as filing.
Updated August 03, 2017. DNA mutations happen when there are changes in the nucleotide sequence that makes up the strand of DNA. This can be caused by random mistakes in DNA replication or even an environmental influence like UV rays or chemicals.
Since mutations are simply changes in DNA, in order to understand how mutations work, you need to understand how DNA does its job. Your DNA contains a set of instructions for building a human. These instructions are inscribed in the structure of the DNA molecule through a genetic code.ince mutations are simply changes in DNA, in order to understand how mutations work, you need to understand how DNA does its job. Your DNA contains a set of instructions for building a human. These instructions are inscribed in the structure of the DNA molecule through a genetic code.