What type of cell division only has one nuclear division

Mitosis.
Mitosis is, according to W.ikipedia, "In cell biology, mitosis is a part of the cell cycle when replicated chromosomes are separated into two new nuclei. In general, mitosis (division of the nucleus) is preceded by the S stage of interphase (during which the DNA is replicated) and is often accompanied or followed by cytokinesis, which divides the cytoplasm, organelles and cell membrane into two new cells containing roughly equal shares of these cellular components.[1] Mitosis and cytokinesis together define the mitotic (M) phase of an animal cell cycle—the division of the mother cell into two daughter cells genetically identical to each other."
Hope this helps, and happy studying~!
~{Dunsforhands}

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.