| xyy karyotype | Abnormal genetic constitution in males characterised by an extra y chromosome. (12 Dec 1998) |
|---|---|
| karyotype | <genetics> The complete set of chromosomes of a cell or organism. Used especially for the display prepared from photographs of mitotic chromosomes arranged in homologous pairs. (18 Nov 1997) |
| XYY male | See: XYY syndrome. (05 Mar 2000) |
| XYY syndrome | <syndrome> A chromosomal anomaly with chromosome count 47, with a supernumerary Y chromosome; controversial evidence associates tallness, aggressiveness, and acne with this condition. (05 Mar 2000) |