Figure 1. The pedigree of Chinese families with choroideremia. Square symbols denote males, and circular symbols denote females. The
shaded symbols indicate ophthalmologist-confirmed choroideremia (CHM). The circles with a dot indicate female carriers. The
arrow points to the proband. The transmission pattern suggested that the CHM was inherited in an X-linked hereditary manner.
Panel A represents Family 1, panel B represents Family 2.