Question

You are looking through a microscope at onion cells and you see a cell with the sister chromatids lined up across the middle of the cell. What phase of mitosis are you observing?

anaphase
telophase
metaphase
prophase

Answer 1

metaphase, my teacher had us remember that meta and middle both started with M.

Answer 2

You are observing the metaphase phase of mitosis

Mitosis is a process of cell reproduction in which a cell divides to produce two daughter cells that are genetically identical to the parent. Metaphase is the third phase of mitosis. During this phase, the two centrosomes pulls the chromosomes towards the opposite poles of the cell which causes the sister chromatids to line up neatly across the middle (equator) of the cell.