Table 5.

Orientation of the fused fragments in t(X;21;19;4)

Derivative chromosome	Tail-to-head		Head-to-tail		Head-to-head		Tail-to-tail
	Count	P value	Count	P value	Count	P value	Count	P value
Der(4)	19	0.29	15	0.39	16	0.5	16	0.5
Der(19)	3	0.06	9	0.26	8	0.41	8	0.41
Der(21)	4	0.45	5	0.44	4	0.45	4	0.45
Der(X)	6	0.45	7	0.26	4	0.35	4	0.35
Overall	32	0.46	36	0.31	32	0.46	32	0.46