What do chromosomes do in meiosis but not in

The daughter cells produced by mitosis are identical,whereas the daughter cells of meiosis are different because crossing over has occurred.

In meiosis, crossing over occurs and also 2 chromosomes pair together (one from the father (sperm) and one from the mother (egg cell)) but in mitosis, only one chromosome that has the DNA that was replicated during replication goes through mitosis and there is no crossing over. In meiosis, 4 identical cells are produced while in mitosis 2 unique cells are produced. 

From our previous experiment, we examined how many drops a penny can hold - and place drops of salt water on the penny after recording 5 trials each, take the average of each solution.