与普遍看法相反，酒窝并非由单一显性基因引起，而是由颧大肌的解剖学变异所致。这种肌肉通常从颧骨延伸至嘴唇而不间断，但在某些人身上会分裂，导致其中一部分附着在皮肤上，并在微笑时将其向内拉扯。虽然这一特征约有五分之一的人拥有，但其遗传模式复杂，受多个基因和发育偶然性影响，而非简单的孟德尔遗传模型。 AI
排序理由 该条目讨论了一个常见的生物特征，并纠正了关于其遗传基础的广泛误解，符合对科学主题的评论的定义。
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酒窝：并非单一基因，而是肌肉变异
本文如何被排名
- Signal score
- 0 / 100
- Composite score across the factors below. Higher = stronger signal that this story matters right now.
- Newsworthiness bucket
- Commentary
- 该条目讨论了一个常见的生物特征，并纠正了关于其遗传基础的广泛误解，符合对科学主题的评论的定义。
- Source corroboration
- Single-source cluster
- Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
- Topics
- other
- Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
- AI-industry relevance
- Low
- Off-topic or adjacent — cluster remains reachable but doesn't surface in AI-industry rankings.
- Story freshness
- 48 days old
- Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.
完整方法见我们的编辑标准。
报道来源 [1]
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一位生物学家解释了为什么有些人有酒窝
Smile dimples aren't caused by a dominant gene — a biologist explains the muscle quirk behind them, and two surprising body parts that work the same way.