Question

1. if chromosomes are not attached to spindle fibers, the cell will stop at: g1 checkpoint g2 checkpoint m checkpoint interphase

Explanation:

The cell cycle checkpoints ensure proper cell division. The M checkpoint (also called the spindle checkpoint) occurs during mitosis and checks if all chromosomes are attached to spindle fibers. If not, the cell stops here to prevent abnormal division. G1 checks for cell size and nutrients, G2 checks for DNA replication, and interphase is the growth phase, not a checkpoint for spindle attachment.

Answer:

M checkpoint