PMC3255494_01
Idiograms showing (A), the maternal normal chromosome 20; (B), the maternal inv(20)(p11.2q13.3); and (C), the patient's rec(20)dup(20p) chromosome.
alm-32-91-g001.jpg
PMC3255494_01_alm-32-91-g001.jpg
F1
This indicates that fertilization of an ovum carrying rec(20)dup(20p) by a karyotypically normal sperm resulted in trisomy for the segment 20pter to 20p11.2 and monosomy for the segment 20q13.3 to 20qter (Fig. 1).