Table 3.

Classification results of eight ANNs used in the two-layer decision tree based classifier

Group	Type of chromosomes	Number of testing chromosomes	Correctly classified chromosomes in the first layer	Classification accuracy rate in the first layer	Correctly classified chromosomes in the second layer	Overall classification accuracy rate
Seven groups	A~G	4607	4354	94.5%	4217	91.5%
A	1–3	600	587	97.8%	585	97.5%
B	4–5	400	387	96.8%	381	95.2%
C	6–12, X	1541	1356	88.0%	1242	80.6%
D	13–15	600	582	97.0%	574	95.7%
E	16–18	600	594	99.0%	592	98.7%
F	19–20	400	395	98.8%	395	98.8%
G	21–22, Y	466	453	97.2%	448	96.2%