Question 1 The root tip cells of an onion plant have 8 pairs of chromosomes. Which of the following correctly describes the number of chromosomes in an onion root tip cell at a specific stage of the cell cycle? A At the end of the synthesis phase, an onion root tip cell will have a total of 32 unique chromosomes. B с D In metaphase, an onion root tip cell will have a total of 16 unique chromosomes composed of 32 chromatids. After cytokinesis, a daughter onion root tip cell will have a total of 8 unique chromosomes. After cytokinesis, a daughter onion root tip cell will have a total of 32 unique chromosomes.

Figure 6.4 Which of the following is the correct order of events in mitosis? a. Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the initotic spindle. The nucleus re-forms and the cell divides. The sister chromatids separate. b. The kinetochore becomes attached to the mitotic spindle. The sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus re-forms and the cell divides. c. The kinetochore becomes attached to metaphase plate. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus re-forms and the cell divides. d. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. The kinetochore breaks apart and the sister chromatids separate. The nucleus re-forms and the cell divides.

If the M checkpoint is not cleared, what stage of mitosis will be blocked? prophase prometaphase metaphase anaphase

The fusing of Golgi vesicles at the metaplhase plate of dividing plant cells forms what structure? cell plate actin ring cleavage furrow mitotic spindle