what would happen if cytokinesis took place before mitosis?

Answer 1

Cytokinesis is part of the mitotic process, so it can't theoretically happen before mitosis.
Mitosis comprises: break-down of the nucleus; condesation of the chromosomes (= 2 sister chromatids "bound" together); the formation of the mitotic spindle by polymerization of tubulin filaments; the binding of chromosomes to the mitotic splindle (each sister chromatide to a different centromere); the alignment of all chromosomes at the mitotic plate; the depolimerization of the spindle, with separation of the 2 sister chromatides; the formation of a new nuclear membrane around each set of chromatides and (at the same time) cell division by cytokinesis.
If you meant: what would happen if cytokinesis took place before all the other steps of mitosis are completed, then you would end up with 2 daughter cells with unequal genetic material, i.e. unequal number of chromosomes or unsegregated chromatides.

Answer 2

Mitosis is the process of dividing the nucleus evenly.
Cytokinesis is the process of dividing the cytoplasm into two daughter cells.

Cytokinesis without mitosis would make one daughter cell with a nucleus and one cell without a nucleus.

Answer 3

You would have identical twins.