When making transgenic mice, to determine whether there has been stable integration of a transgene into the mouse chromosome, tail biopsies are taken from the mouse pups and tested for the presence of the transgene by

Western blot

Explanation: western blot is a laboratory method used to detect specific protein molecules from among a mixture of proteins.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.