concedes that parthenogenesis by itself cannot account for Jesus’ birth because human males need a Y chromosome, but indicates that there is a mutation that produces people who are genetically male with XY chromosomes but, because of an inability to respond to testosterone, appear as completely normal females, although sterile and without a uterus. Mary, he proposes, could have been such a person who went on to develop an ovum and uterus. ‘If this happened, and if the ovum developed parthenogenetically, and if a back-mutation to testosterone sensitivity took place, we would have the situation
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