His argument is that the unusual history of the Ashkenazim has subjected them to unique evolutionary pressures that have resulted in this paradoxical state of affairs.
他认为正是异常的历史环境强加给了德系犹太人独有的进化压力,才导致了这些看似奇怪的现象。
3
Dr Cochran argues that something similar happened to the Ashkenazim. Genes that promote intelligence in an individual when present as a single copy create disease when present as a double copy.