Question

What would happen if mitosis occured, but cytokinesis did not?

Answer 1

Since cytokineses is when the membrane draws inwards to divide the cell into two daughter cells, if cytokinesis did not occur, you'd have a cell with two nuclei. it's called a coenocyte.

Answer 2

If the cell underwent mitosis without cytokinesis, the cell would have a double set of chromosomes in it because it wouldn't have split and given the copy to the new cell.