了解为什么这是世界上最稀有的眼睛颜色

 了解为什么这是世界上最稀有的眼睛颜色

Michael Johnson

蓝色的眼睛在世界上非常受欢迎,与棕色的眼睛相比,我们可以说蓝色的眼睛是罕见的。 然而,这一个 眼色 您能说出哪种肤色在人群中最为罕见吗?

您可能会感到惊讶,因为您可能见过有几个人的眼睛是这种颜色,但是,只有一小部分人的眼睛是这种颜色。 我们说的是绿色眼睛!

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根据美国眼科学会(AAO)的一项调查,在整个人口中,只有2%的人眼睛呈绿色,而这是由于一个非常有趣的遗传问题造成的。

据在美国克利夫兰一家诊所从事遗传学工作的朱莉-凯普兰(Julie Keplan)博士称,我们眼睛75%的颜色构成来自于负责产生OCA2基因的OCA2基因。 黑色素 存在于我们体内。

如果至少有一个基因拷贝起作用,眼睛的颜色通常较深,如棕色和绿色。

这种基因遗传自父母,这就是为什么眼睛的颜色通常与父母中的一方相似。 您还记得在学校的遗传学课程中,老师讲到的 "偶氮 "和 "偶氮 "吗? 嗯,也差不多。

事实证明,棕色眼睛是显性基因,因此当父母一方为棕色眼睛时,其后代很可能会遗传这一性状。 在这种情况下,出现绿色或蓝色眼睛的几率非常小。

科学家们认为,在人类出现之初,所有人类的眼睛都是棕色的,因为人类出现在非洲和亚洲大陆,那里的阳光更强烈,需要更多的保护。

例如,迁徙到气候寒冷的欧洲的人开始将眼睛以及皮肤和头发的颜色变浅。

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但后来,随着基因的杂交,基因的混合开始产生这种变异,这使得遗传学变得更加有趣。

Michael Johnson

Jeremy Cruz is a seasoned financial expert with a deep understanding of the Brazilian and global markets. With over two decades of experience in the industry, Jeremy has an impressive track record of analyzing market trends and providing valuable insights to investors and professionals alike.After earning his Master's degree in Finance from a reputable university, Jeremy embarked on a successful career in investment banking, where he honed his skills in analyzing complex financial data and developing investment strategies. His innate ability to forecast market movements and identify lucrative opportunities led him to be recognized as a trusted advisor among his peers.With a passion for sharing his knowledge and expertise, Jeremy started his blog, Stay up to date with all the information about the Brazilian and global financial markets, to provide readers with up-to-date and insightful content. Through his blog, he aims to empower readers with the information they need to make informed financial decisions.Jeremy's expertise extends beyond blogging. He has been invited as a guest speaker at numerous industry conferences and seminars where he shares his investment strategies and insights. The combination of his practical experience and technical expertise makes him a sought-after speaker among investment professionals and aspiring investors.In addition to his work in thefinance industry, Jeremy is an avid traveler with a keen interest in exploring diverse cultures. This global perspective allows him to understand the interconnectedness of the financial markets and provide unique insights on how global events impact investment opportunities.Whether you are an experienced investor or someone looking to understand the complexities of the financial markets, Jeremy Cruz's blog provides a wealth of knowledge and invaluable advice. Stay tuned to his blog to gain a thorough understanding of the Brazilian and global financial markets and stay one step ahead in your financial journey.