Table 1.

The number of sequences and the normalized CQs of the positive control data

Data set	Autosomal sequences	Normalized median CQ	X sequences	Normalized median CQ	Y sequences	Normalized median CQ
H. sapiens	581,737	1.00	39,844	1.85	7,934	0.00
D. melanogaster	48,870	1.00	18,011	1.96	139	0.025

The number of sequences and the normalized median chromosome quotients (CQs) of the positive control data sets illustrate that autosomal sequences have chromosome quotients distributed around one, X sequences have chromosome quotients distributed around two, and Y sequences have chromosome quotients near zero. The distributions of chromosome quotients from different chromosomes are shown in Figure 1.