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XXX syndrome

a rare disorder characterized by the presence of three X (female) chromosomes instead of the normal two X chromosomes (46,XX). The majority of affected females are physically and mentally normal. Delays in mental development, when present, are usually mild. Also called 47,XXX syndrome; triple-X condition; trisomy X.

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Psychology term of the day

June 17th 2024

motor dominance

motor dominance

the controlling influence of one cerebral hemisphere shown in motor activity, such as writing or throwing a ball.