What are the four parts of mitosis? Explain.
-Prophase, Chromatin in the nucleus condenses to form chromosomes. The pairs of centrioles move to opposite sides of the nucleus. Spindle fibers form a bridge between the ends of the cell. The nuclear envelope breaks down.
-Metaphase, The chromosomes line up across e center of the cell. Each chromosome attaches to a spindle fiber at its centromere.
-Anaphase, The centromere split. The two chromatids separate, and each chromatid becomes a new chromosome. The new chromosomes move to opposite ends of the cell. The cell stretches out as the opposite ends are pushed apart.
-Telophase, The chromosomes begin to stretch out and lose their rodlike appearance. A new nuclear envelope forms around each region of chromosomes.