Biology
Cell division, or mitosis, is divided into four phases. The first–prophase–involves several big changes.
Chromatin coils: Our chromosomes are wrapped like thread around little spools called histones. This combination of DNA and histones is “chromatin.” As chromosomes prepare for action, their chromatin winds into tight, compact coils.
Centrioles move: Each cell has two sets of these barrel-shaped bodies. As mitosis begins, the centrioles move to opposite sides of the cell. They are about to engage in a massive contest of tug-of-war. (More about this in upcoming poems).
Envelope fades: The nucleus is home to the chromosomes in animal, plant, and fungal cells. Usually, a system of membranes surrounds the nucleus. At the start of mitosis, these membranes fade away so the chromosomes are exposed. (125 words)
Next time: Metaphase!
Drawing
It’s fun to draw cells. They can be any shape you like, and quick, loose lines make them look more cell-like. It’s hard to go wrong! Here’s a page of cells from 2021:
The original drawing–and poem–from 2000 is shown below. The series of four mitosis limericks (prophase, metaphase, anaphase, and telophase) may be the most-viewed images from my early days of cartooning. Definitely time for an update!