新闻 > 社会
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China

人类肤色差异90万年前就开始了 白皮肤也来自非洲

2017-10-17 07:59:10   科技日报

科技日报北京10月15日消息(记者房琳琳)《新科学家》官网日前报道称,一项最新的研究成果表明,人类肤色差异变大,至少从90万年前就开始了。基于非洲地区人们皮肤色素沉着相关基因变异的分析发现,黑皮肤相对来说拥有比较古老的遗传变异,表明“白种人更先进”的种族主义观念存在缺陷。

美国宾夕法尼亚大学尼古拉斯·克劳福德和沙拉·泰什科夫在埃塞俄比亚、坦桑尼亚和博茨瓦纳招募了约1500名种族和基因多样化的志愿者进行研究,志愿者同意提供DNA样品并测量其皮肤色素沉着。

组合数据允许团队在人类基因组中,找到与皮肤色素沉着水平非常相关的8个位点,这些位点占据了志愿者皮肤色素沉着整体遗传变化的30%。每一个变异位点都存在与较浅皮肤相关的遗传变异。7种较浅肤色的基因变体出现在至少27万年前,其中4个变体出现在90万年前。

以前对MI1R皮肤色素沉着基因的研究导致许多遗传学家认为,黑皮肤颜色是所有非洲人后裔的固定且一致特征。但撒哈拉以南非洲地区皮肤色素沉着更复杂,比如南非的狩猎采集者通常有轻微色素沉着的皮肤,但其属于智人家族树中的最古老分支之一。

对肤色和其他性状的遗传学研究,超越了了解物种进化史的意义。有些种族主义者希望将皮肤色素沉着与知识特征或道德行为特征联系起来。白人至上主义的观点认为,欧洲人通常较浅的皮肤本身具有优越性。但此次研究证明,与白皮肤相关的遗传基因和变体,实际上来自非洲。

事实上,最近人类学家的观点调查显示,他们大多数十分反感“将人类以生物种族分类”的观念。

科技日报总编辑圈点

傲慢与偏见折射的是人性,而不是科学。一旦把某些人群的好恶看成真理,最后往往会被现实打脸,比如曾经盛行于欧洲的地心说。对种族和肤色的歧视也是如此。它的背后是饱含血泪的殖民历史,并没什么科学依据。令人欣慰的是,科学在进步,它将一一揭穿曾经的傲慢与偏见,让人类更好地认识自然规律,也更好地认识自己。

展开全文
责任编辑:刘敏丹 CN012
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China

热点新闻

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China
点击查看更多
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20171017/31578628.html?shouye
Server: cms-8-252
Date: 2024/03/29 07:48:14

Powered by China
China