Genetics: The X factor

[摘要] The sequence of the feminine X chromosome is prime hunting ground for geneticists interested in the evolution of the cognitive and cultural sophistication that defines the human species. The complete sequence of the X chromosome confirms that an unusually large number of its genes code for proteins important tobrain function. Therefore if we want to understand the cognitive X factor that seperates us from the rest of the animal kingdom, then it seems that the Xchromosome is the place to start looking.

[关键词] LINKED MENTAL-RETARDATION