Question

all of the following are true about the m phase checkpoint except:
it occurs during metaphase.
ensures that spindles are attached to chromosomes.
ensures that chromosomes align at the poles.
ensures that chromosomes align at the middle of the cell.

Explanation:

The M phase (spindle) checkpoint occurs during metaphase. Its functions include verifying spindle attachment to chromosomes and that chromosomes align at the cell's metaphase plate (middle of the cell). Chromosomes align at the poles during anaphase, not as a function of the M checkpoint.

Answer:

Ensures that chromosomes align at the poles.