Not every modern human has the same set of Neanderthal DNA, however; different people will, by chance, have inherited different fragments. But there are also some areas, termed "Neanderthal deserts," where none of the Neanderthal DNA seems to have persisted. Notably, the largest Neanderthal desert is the entire X chromosome, raising questions about whether this reflects the evolutionary fitness of genes there or mating preferences.
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当代青年的成长之路，常被层层期待裹挟。求学时要优秀、要拔尖，步入社会要自律、要体面。“不负众望”的标尺，始终悬在头顶。个体在社会化过程中逐渐将其内化为自我期待，一旦自身状态与期待不符，就容易产生愧疚感与自我否定。