Which of the followings would contain genetic material that is 100% identical? A: Homologous chromosomes B: Sister chromatids C: X and Y chromosomes D: Acrocentric chromosomes E: non-sister chromatids

Telophase begins when( ). A: chromatids line up in the middle of the cell B: the nuclear envelope breaks down C: chromatin condenses D: daughter chromosomes arrive at opposite poles of the cell E: centrioles reach opposite poles of the cell

Which of the APC descriptions is incorrect? A: APC is anaphase-promoting complex. B: APC is a ubiquitin ligase E3. C: The activation of APC eventually leads to the release and activation of the separation enzyme, which in turn leads to the separation of sister chromatids. D: Activated cdc20 binds to APC and inhibits APC activity.

Which of the following descriptions about anaphase is CORRECT?() A: The<br/>kinetochore microtubules are shortened by de-polymerization B: Microtubules<br/>attach to kinetochore of chromosomes C: The<br/>separated chromatids move to opposite spindle poles D: The<br/>shape of cell is stretched during the latter part of anaphase