A mutagen (Latin, roughly change maker) is an agent that changes the genetic information (usually DNA) of an organism and thus increases the number of mutations above the natural background level. Mutagens can be chemical compounds or radiation.
There are several methods to detect how mutagenic an agent is:
... is 41 years. For every 100 females there are 92.6 males. For every 100 females age 18 and over, there are 90.2 males.
The median income for a household in the town is ...