The cells in our body are constantly dividing to produce new cells. As we journey through life cells wear out and need replacing. We also need new cells to grow. We are continuing to follow chapter 1 in The Way We Work by David Macaulay to learn about cells.
This week we built cells from craft supplies and then modified our cells and split them into two the same way our bodies do. In addition to being a lesson about mitosis, this lesson served as a good review since several organelles were included in the cells.
Golgi Apparatus - beads
Rough Endoplasmic Reticulum - beads
Mitochondria - foam hearts
Neucleus (DNA) - yarn
Cytoskeleton - pipe cleaners
Enzymes - marbles
Ribosomes - pom-poms
Membrane Sacks - balloons
ATP (energy) - fuse beads
Cell Walls - plastic bags
To duplicate the DNA -
When it was added to the original cell, the yarn was cut into 46 short pieces representing the 46 chromosomes. Each chromosome was untwisted (only one-half of the yarn strands) in the original cell. When the DNA was duplicated the mate yarn had to be found and matched up.
All the previously mentioned steps happen before the cell begins to divide during interphase.
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