| xyster xysters
 xysti
 xystoi
 xystos
 xysts
 xystus
 XYY
 xyy karyotype
 XYY male
 
 | XYY syndrome X body
 X chromosome
 X chromosome
 X disease
 X disease of cattle (current term)
 x factor
 X inactivation
 X linked disease
 X ray
 
 | x wave X zone
 y
 Y
 y-angle
 Y-axis
 y-axis
 Y-linkage
 y-linked
 Y-linked gene
 
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