Chapter 3

• What happens during the prophase?

  chromosomes condense

  the sister chromosomes are joined by a centromere

  centrosomes move to opposite ends of the poles

  spindle fibers emerge from the centrosome

  the nuclear envelope breaks
• What happens during the metaphase?

  centrosomes reach opposite poles, and the spindle fibers continue to extend

  the chromosomes line up at the quarter so they’re at equal distance from the centrosome poles
• what happens during the anaphase?

  the sister chromatids separate at the centromere

  spidle fibers shorten

  the separated chromatids (chromosomes) are pulled to opposite ends of the poles by spindl fibres
• what happens during the telpohase?


  the chromosomes are at different ents of the poles and begin to decondense

  the nuclear envelope begins to reform

  the spine fibres break down