A type of cell division where chromosomes separate unevenly, resulting in daughter cells with different genetic material.
From Greek 'hetero-' meaning 'different' and 'kinesis' meaning 'movement.' The term emerged in cytology during the late 19th century to describe abnormal patterns of chromosome distribution during cell division.
This weird cellular behavior can happen when cell division goes wrong, and it's one reason why some organisms develop cancers or birth defects—essentially your cells are trying to divide but doing it messily!
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