Eye color is also related to melanin.

眼睛颜与黑有关。

But some of them happened to produce less melanin.

比如钙，铁，镁，磷酸盐，锌。

This pigment ratio is controlled by a gene, which also controls the melanin in our skin.

这比例是由一个基因控制，这个基因也控制着我们皮肤中黑。

The melanin is what darkens your skin.

黑使皮肤变黑。

The melanin makes the color of the eyes?

黑决定了眼睛颜？

The more melanin you have, the darker your skin.

你拥有黑越多，你皮肤越黑。

For light-skin people, that extra melanin darkens their skin and produces a tan.

这取决于阳光照射时皮肤反应。

Some are yellow others are red and some contain the dark melanin pigment.

有些是黄，有， 同时也有些有深深黑。人们以为。

The melanin levels in a baby's eyes determine how dark their eyes become.

婴儿眼睛中黑水平决定了他们眼睛变黑程度。

OCA2 is responsible for a protein called melanin in our eyes.

OCA2 负责我们眼睛中一叫做黑蛋白质。

If they can't mature, they won't be able to produce melanin.

如果它们不能成熟，就不能产生黑。

My eyes have a lot of melanin, that's why they are dark brown.

我眼睛有很多黑，所以是深褐。

Your eyes don't have any pigment or melanin in them.

你眼睛没有黑或其他。

Melanocytes associated with the hair root will deposit melanin to the cells that compose our hair.

与发根相关黑细胞会将黑沉积到构成我们头发细胞中。

However, for those one in 100, the amount of melanin in each eye isn't uniform.

然而，对于这分之一人来说，每只眼睛中黑数量并不均匀。

Where melanin isn't produced, those areas will turn white, which is why people get white hair.

在黑不产生地方，这些区域就会变白，这就是为什么人们会有白头发。

Squid ink is made mostly of mucus and melanin, which produces its dark coloring.

乌贼墨水主要由粘液和黑组成，从而造成了深。

Thus, melanin production can be controlled by a few genes being turned on and off.

因此，黑产生可以由一些基因开启和关闭来控制。

It gets its color from two types of melanin: brown-black eumelanin and red-yellow pheomelanin.

棕黑真黑和黄褐。

Since melanin is a light brownish, tan colored pigment, so are our freckles.

因为黑是一浅棕或者是棕褐，我们雀斑也是这个颜。