Modeling Mitosis Lab

Found below are the stages of Mitosis presented through diagrams in which we used pipecleaners, string and beads to explain our understanding.

Mitosis:

The process of duplicating cells.

Interphase:

The cell is preparing itself for mitosis while DNA is replicating itself.

Prophase:

In this stage (prophase) the chromatids find their match and using a centromere are attached together forming x’s. Attached to the chromosomes are a pink string which represents the growing spindle fibres. The nuclear membrane also disintegrates in this step of mitosis and leaves the remainder of the nuclear contents (which includes the chromosomes) .

Metaphase:

As we mentioned, the nuclear membrane has disintegrated now and the chromosomes are able to move and align in the middle of the cell. Attached to each chromotoide is a spindle fibre which will be useful in the next step.

Anaphase:

The spindle fibres pull the chromosomes apart now making the chromosomes chromatids again. Each chromatid is pulled to the poles (opposite sides) of the cell.

Telophase:

Spindle fibres have now disappeared and the nuclear membrane has reformed in both of the cells. The chromosomes are now encased and are able to relax into chromatin again.

Cytokinesis:

The end result is that I now have two identical and separate cells from the one cell that I started off with.

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