The quality or condition of being right-handed or having parts developed toward the right side.
From 'dextral' plus the noun-forming suffix '-ity'. Parallels the structure of 'laterality' and 'sinistrality,' all describing directional bias in organisms.
Human handedness is only about 10% inherited genetically—the rest depends on culture, education, and brain development, which is why rates of left-handedness have nearly tripled in countries where schools stopped forcing children to write with their right hand.
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