Points or instances where things cross from one category to another; in genetics, the exchange of genetic material between chromosomes; in vehicles, a car type between sedan and SUV.
From 'cross' + 'over' (Old English 'ofer'). The compound 'crossover' emerged in early 20th-century usage and gained prominence in genetics and automotive terminology.
Genetic crossovers during reproduction create genetic diversity—it's why siblings aren't identical clones and why we inherit traits from distant ancestors in unexpected combinations!
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