Mitosis

A group of students observed a mammalian cell slide and counted the abundance of each phase. They then pooled their data, and the observed percent of the total cell count for each phase is as follows: I = 67%, P = 13%, M = 9%, A = 5%, T = 6%. Assuming that it takes 10 hours for the cell to complete a round of the cell cycle, how long would it take to complete both metaphase and anaphase (in minutes)?

84

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Enter the number of onion root cells in interphase, prophase, metaphase, anaphase, and telophase out of 100 cells

Interphase: 58 Prophase: 13 Metaphase: 9 Anaphase: 5 Telophase: 4

Match the descriptions of the cell appearance to the corresponding stage of mitosis

Prophase: A network of intertwined darkly stained thread-like structures in the middle of the cell Metaphase: a single line of darkly stained thread-like structures in the middle of the cell that is connected to two poles by fibers Anaphase: Two areas of darkly stained thread-like structures, each of which is connected by fibers to a different pole of the cell Telophase: Two areas of moderately stained material that are widely separated and partially surrounded by a membrane

You treat a cell with colchicine, a spindle-destabilizing drug. Which part of mitosis will be inhibited as a result of this treatment?

Separation of sister chromatids

Which statements accurately describe what is shown in the center of the micrograph?

Sister chromatids have separated, Cytokinesis in occurring, New nuclear membranes have formed

Based on your observations of the onion root slide, what is the shortest phase of mitosis?

anaphase

Figure 1 shows _____ cells and Figure 2 shows ____ cells. The main distinguishing feature used for identification is the _____

animal; plant; cell wall

A group of students observed onion root cells on slides and counted the abundance of each phase. They then pooled their data, and the combined count for each phase is as follows: I = 1500, P = 250, M = 140, A = 70, and T = 90. The total number of cells is 2050. Which sequence orders the phases of the cell cycle from longest to shortest?

interphase, prophase, metaphase, telophase, anaphase