MCPH1 and autosomal recessive primary microcephaly: Two newly discovered genes, Microcephalin (MCPH1) on chromosome 8p23 and abnormal spindle-like microcephaly associated (ASPM) on chromosome 1q31, attracted much attention when reported to be (1) associated with autosomal recessive primary microcephaly, (2) positively accelerated in molecular evolutionary rate through the simian line leading to Homo sapiens, and (3) under recent positive selection in modern humans (Evans et al., 2005; Mekel-Bobrov et al., 2005).