This can be caused by the loss of three additional genes , each of which has different effects , resulting in three types of syndrome . This may be caused by the loss of three different additional genes , each of which has different effects , resulting in three types of syndrome .
Ini boleh disebabkan oleh kehilangan tiga gen tambahan, masing-masing mempunyai kesan yang berbeza, mengakibatkan tiga jenis sindrom. Ini mungkin disebabkan oleh kehilangan tiga gen tambahan yang berbeza, masing-masing mempunyai kesan yang berbeza, mengakibatkan tiga jenis sindrom.