scientist
definition
100
carl wilhelm scheele
devised the first successful testfor detecting the poison arsenic in corpses in 1775
100
grooves
the cut or low-lying portions between the lands in a rifled bore
200
william nichol
invented the polarzing microscope in 1828
200
gauge
size designation of a shotgun originally the number of lead balls with the same diameter as the barrel that would make a pound.
300
alphonse bertillon
study of the stucture of living organisimapplied to the first system of personal identification
300
choke
an interior constriction placed at or near the muzzle end of a shotgun's barrel to control shot dispersion
400
Dr.Karl Landsteiner
dicovered that blood can be grouped into diffrent categories in 1901
400
gene
the basic unit of heredity consisting of a dna segment located on a chromosome
500
sir alec jeffreys
developed the first DNA profiling test in 1984
500
short tandem repeat (STR)
a region of a dna molecule tht contains short segments of three to seven repeating base pairs
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