Eye color is also related to melanin.

颜色与色素有关。

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.

这种色素比例是由一个基因控制，这个基因也控制着我们皮肤色素。

The melanin is what darkens your skin.

色素使皮肤变。

The melanin makes the color of the eyes?

色素决定了颜色？

The more melanin you have, the darker your skin.

你拥有色素越多，你皮肤越。

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

OCA2 负责我们一种叫做色素蛋白质。

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.

有些是黄色，有红色， 同时也有些有深深色素。人们以为。

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

婴儿色素水平决定了他们变程度。

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

如果它们不能成熟，就不能产生色素。

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

我有很多色素，所以是深褐色。

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

你没有色或其他色素。

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

与发根相关色素细胞会将色素沉积到构成我们头发细胞。

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，每只色素数量并不均匀。

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

在色素不产生地方，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色素组成，从而造成了深色。

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

因此，色素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.

棕色真色素和红黄色褐色素。

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

因为色素是一种浅棕色或者是棕褐色色素，我们雀斑也是这个颜色。