Compare metaphase you and metaphase II?

It is different because pairs of chromosomes line up down the middle and in metaphase II single chromosomes are lined up across the middle

They are terms involving cell division.

Metaphase, from the ancient Greek μετα (after) and φασις (stage), is a stage of mitosis in the eukaryotic cell cycle in which condensed chromosomes, carrying genetic information, align in...

In mitosis metaphase the mitotic spindel attaches to one side of a pair of chromosomes and seperates them so that one chromosome ends up on each side.In metaphase 1 of meiosis, the mitotic spindel...

Non-disjunction is the failure of a pair of chromosomes or chromatids to separate.  Since this happens in both metaphase I and II, non-disjunction can occur in either stage. In metaphase I it...