Fig. 6

A hypothetical formation model for the inverted duplication of the paternal X chromosome during meiosis II of the paternal germ cell (A), LCR1’ and LCR2’ were mismatched because of the similar repeat sequences between the LCRs (B), resulting in unequal exchange and the production of inv-dup-type and del-type gametes (C), and the former is passed on to the patient