  == Other lit worth covering? ==  * Badcock, C., & Crespi, B. (2006) Imbalanced genomic imprinting in brain development: An evolutionary basis for the aetiology of autism. Journal of Evolutionary Biology 19: 1007-32. * Bocklandt S, Horvath S, Vilain E, et al. (2006) Extreme skewing of X chromosome inactivation in mothers of homosexual men. Human Genetics 118: 691-694 * Haig, D., & Wharton, R. (2003) Prader-Willi syndrome and the evolution of human childhood. American Journal of Human Biology 15: 320-9. * Haig, D. (2000a) The kinship theory of genomic imprinting. Annual Review of Ecology and Systematics 31: 9-32. * Haig, D. (2004a) Genomic imprinting and kinship: How good is the evidence? Annual Review of Genetics 38: 553-85. * Haig, D. (2006b) Self-imposed silence: Parental antagonism and the evolution of X-chromosome inactivation. Evolution 60: 440-7.