XXYY syndrome
48,XXYY
Also known as: 48 XXYY
48,XXYY has two extra sex chromosomes, one X and one Y, added to a male complement. It shares features with Klinefelter syndrome, including tall stature and infertility, often with additional neurodevelopmental and behavioral features.
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What the notation means
48- total chromosome count (normal is 46)
XXYY- sex chromosomes: two X + two Y