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生物学 1001 (001-013) 第24课学习测验
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将历史选择压力与由此产生的次级进化结果相匹配。 1: A mutation that provides resistance to malaria 2: A mutation that provides some resistance to tuberculosis 3: A CCR-5 cell receptor mutation that provides resistance to small pox
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題目要把歷史上因選擇壓力而出現的次級進化結果逐一對應。
選項1的敘述是：携带该突变等位基因的纯合子患有镰状细胞贫血症。這裡要注意，與疟疾抗性的經典關係是“異質性受益”即異質合子攜帶者對疟疾具有保護作用，而純合子會導致镰状细胞贫血症（血紅蛋白病的一種）。因此若要把疟疾壓力與次級進化結果對應，應該是描述異位受益的情況，而非說純合子患病。換言之，這個......Login to view full explanationLog in for full answers
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