摘要:名词解释(每题2分)1．遗传瓶颈(genetic neck)在卵母细胞成熟过程中，线粒体数量急剧下降，由10万个左右下降到不足100个的现象称为“遗传瓶颈”。
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Of course I could give the classic example of the poor giraffe who one day (she) just found herself with an ashy long neck because of genetic mutation.
当然，我可以举这只可怜长颈鹿的经典例子，一天她突然发现自己因为基因突变而有了一条灰色的长脖子。 。
Enerback and his team studied five patients and confirmed, using genetic analysis, that the cells around the neck were indeed brown fat.
enerback和他的小组研究5例病人后证实，用遗传学分析，在脖子上的组织确实是棕色脂肪。
A giraffe acquired the genetic specification for a long neck through generations of browsing upon the upper foliage of trees.
长颈鹿获得遗传的特征长脖子是由于它们世世代代啮食树上部的树叶的原故。
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