Your mass and weight is the same everywhere in the universe. :)
Depends on the situation Usually the hardest would be blood samples of the Unsub. Again It depends on the situation.
Answer: kinetochore
Spindle
fibers are aggregates of micro-tubules that move chromosomes during cell division. They attach to the kinetochore, a structure on chromatids, that when it's pulled separated sister chromatids. The kinetochore is a specialized protein complex found in the centromere of the chromosome.