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<p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal">文中文献：</p><p style="font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;color:#333333;font-weight:normal;text-align:justify;" data-flag="normal">1. 图为精子生产过程中的自然选择的示例。新突变（灰色圆圈）会增加精子生产过程中的细胞增殖速度，保证该突变对应的等位基因比其他等位基因遗传到更多的精子中。</p><p style="font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;color:#333333;font-weight:normal;text-align:justify;" data-flag="normal"><img data-key="0" src="http://imagev2.xmcdn.com/storages/6f5f-audiofreehighqps/07/1D/GKwRIRwFtEr2AAEcIAEMV3-t.jpg!op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/storages/6f5f-audiofreehighqps/07/1D/GKwRIRwFtEr2AAEcIAEMV3-t.jpg?op_type=0" data-large="http://imagev2.xmcdn.com/storages/6f5f-audiofreehighqps/07/1D/GKwRIRwFtEr2AAEcIAEMV3-t.jpg!op_type...