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[自然百科] 【整理】2009-08-03 为何婴儿大多拥有蓝色眼睛?

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[自然百科] 【整理】2009-08-03 为何婴儿大多拥有蓝色眼睛?

本帖最后由 myconsent 于 2009-8-9 10:52 编辑

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Baby Blue Eyes

 

Do you know that most babies are born with blue eyes? It's true.

 





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Transcript(for reference)—by myconsent

 

Hi, it’s Kasey-Dee Gardner for Why? Tell Me Why? This week we received a question about baby eye color. The question was “why are most babies born with blue eyes?”.

And I wasn’t sure that was a true statement, but it is in fact a true statement.

 

Actually we think most babies are, I don’ t have an exact number for you, and to understand why, you have to understand where the color of the eye comes from.

 

The color of the eye is determined by the pigment(色素) which is color particles in the back part of the iris(虹膜), and pigment in the main tissue of the iris. And these develop actually separately. So when a baby is born, the pigment in the back part of the iris, of the healthy iris, is already formed, and the pigment in the main tissue of the iris isn’t. This pigment is called melanin(黑色素).

 

A baby would be born with pigment right here on this bottom layer. And they would all be born the same way. Everybody has the cells that make melanin.

 

In the people who have blue eyes, those cells are just not activated to produce the melanin. And that’s determined by their genes. In babies who go on to have brown eyes by six months or a year, their genes have determined that their cells will produce melanin and that happens over that first year of life. In babies who go on to have blue eyes, their cells are not programmed by the genes to produce melanin. And their eyes will remain blue as they were at birth.

 

So how many cells are stacked in there, how hard the light, how much the light has to do to get through all those cells, will also impact and it will create shades, of greens and blues and browns and hazels, because the light is bouncing around a lot.

 

So this is actually across races? Uh this is a, this has been normal development cycle of the eye. So a baby who will have darkly pigment in skin, and darkly pigment at eyes, ah, I say the one, one year mark, can be born with blue eyes, simply because the melanin has not yet been generated in the tissues of the iris.


 

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HW

\for Why Tell Me Why. This week we will see the question about baby eye color. The question was “why are most babies born with blue eyes”.
And I wasn’t shown that was a true statement, but it is in fact a true statement.


Actually we think most babies are, I don’ t have an exact number for you, and to understand why you have to understand where the color of the eye comes from. The color of the eye is determined by the \ which is color \ in the back of the eyelids.


And \ in the main tissue of the eyelids, and these develop actually separately. So when a baby is born, the \ in the back part of the eyelids and \ eyelids is already formed, and the \ in the main tissue of the eyelids isn’t. This cell is called m. Baby would be born with p right here on this bottom area. And they would all be born the same way. Everybody has the \ that makes n. In the people of blue eye, those cells are just not activated to produce the n. And not determined by their genes. In babies who go on to have brown eyes by six month for a year, their genes have determined that their cells will produce m and that happen over that first year of life. In babies who go on to have blue eyes, their cells are not programmed by the genes produce m. And their eyes will remain blue as they were there.


So how many cells scatter in there, how hard the light, how much the lights have due to get through all those cells will also impact in recreated shapes. Of green and blue and brown and h, because of the light is bouncing around the light.

So this is actually across races?

Um, this is the, this is the normal development cycle of the eye.

So a baby who will have darkest p skin, and darkest p eyes.

Ah, I said that, one, one year mark can be born with blue eyes. Simply because the n has not yet been generated in the tissue of the eyelids.

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  • wukeyu123

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Homework of Renatus Pausini
Hi, it’s ~ for Why, tell me why. This week we would seek the question about baby eye color. The question was: why are most babies born with blue eyes. I wasn’t sure if that’s a true statement, but it is in fact a true statement. Actually, we think most babies are, I don’t have exact number for you, and to understand why, you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back of the iris and pigment in the main tissue of the iris. And these develops actually separately. So when a baby is born the pigment in the back part of the iris, of a healthy iris, is already formed and the pigment in the main tissue of the iris isn’t. This pigment is called ~. A baby would be born with pigment right here on this bottom layer. And they would all be born in the same way. Every has the cells that make ~. In the people who have blue eyes, those cells are just not activated to produced the ~ and that’s determined by their genes. And babies who go on to have bright eyes for six months or a year their genes have determined that their cells would produce ~ and that happens over that first year of life. And babies who go on to have blue eyes, their cells are not programmed by the genes to produced ~. And their eyes will remain blue as they were at birth. So how many cells are stacked in there, how much the light has to do to get through all those cells will also impact and it will create shades of greens and blues and browns and hassles because the light is bouncing around a lot. So this is actually a cross races this is the normal development, cycle of the eye, so a baby who will have darkly pigment in skin and darkly pigment in eyes, I say the one year mark can be born with blue eyes simply because the ~ has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

实现无障碍英语沟通
本帖最后由 wukeyu123 于 2009-8-4 07:48 编辑

Homework
Hi, it’s Kasey, for WhyTellMeWhy. This week we received a question about baby eye color. The question was: why are most babies born with blue eyes. And I wasn’t sure if that’s a true statement, but it is in fact a true statement. Actually, we think most babies are, I don’t have an exact number for you, and to understand why, you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back part of the iris and pigment in the main tissue of the iris. And these develop actually separately. So when a baby is born the pigment in the back part of the iris, of a healthy iris, is already formed and the pigment in the main tissue of the iris isn’t. This pigment is called melanin. A baby would be born with pigment right here on this bottom layer. And they would all be born in the same way. Everybody has the cells that make melanin. In the people who have blue eyes, those cells are just not activated to produced the melanin, and that’s determined by their genes. And babies who go on to have brown eyes by six months or a year their genes have determined that their cells will produce melanin, and that happens over that first year of life. And babies who go on to have blue eyes, their cells are not programmed by the genes to produced melanin. And their eyes will remain blue as they were at birth. So how many cells are stacked in there, how much the light has to do to get through all those cells will also impact and it will create shades of greens and blues and browns and hazels because the light is bouncing around a lot. So this is actually a cross races this is the normal development, cycle of the eye, so a baby who will have darkly pigment in skin and darkly pigment in eyes, I say the one year mark can be born with blue eyes simply because the melanin has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

口译专员推荐—>口译训练软件IPTAM口译通
HW
Hi, it’s Kasey. G for Why Tell Me Why. This week, we received question about baby eye color. The question was why are most babies born with blue eyes. And I wasn’t sure that’s a true statement. But it is in fact a true statement.

Actually, we think most babies are. I don’t have any exact number for you. Um, and understand why, you have understand where the color of the eye comes from. The color of the eye is determined by the pigment, which is color particles in the back of the iris and pigment in the mean tissue of the iris. And these develop actually separately. So when a baby is born, the pigment in the back part of the iris of the healthy iris is already formed. And pigment in the mean tissue of the iris isn’t. This pigment is called m?. A baby would be born with pigment right here on this bottom layer. And they would all be born the same way. Everybody has the cells that make m?.  In the people who have blue eyes, those cells are just not activated to produce the m? and that’s determined by their genes. Babies who go on to have brown eyes by 6 months or a year, their genes have determined that their cells would produce m?. And that happens over that first year life. And babies who go on to have blue eyes, their cells are not programmed by the gene to produce m?. And, um, their eyes will remain blue as they were birth. So how many cells are stacked in there, how much the light has to do to get through all those cells were also impacted. And it will create shades of greens, blues, browns and hazels. Because the light is bouncing around a lot.

So this is actually a cross races. Um, this is um, this is a normal development cycle of the eye. So a baby who will have darkly pigment skin and darkly pigment eyes, say the one year mark, can be born with blue eyes. Simply because the m? has not yet been generated in tissues of the iris.
1

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  • wukeyu123

HOMEWORK

This week we will see the question about baby eye color.

The question was: why are most babies born with blue eyes? And I was ensured that was a true statement but it is, in fact, the truth statement.

Actually, we think most babies are, I don't have exact number for you. And to understand why, you have to understand where the color of the eye comes from. The color of the eye is determine by the pigment, which is color particles and back part of the ? and pigment in the main tissue of the ?. And these develop, actually, seperately. So, when a baby is born, the pigment in the back part of the ? the healthy ? is already formed and the pigment in the main tissue of the ? isn't. This pigment is called ?.

A baby would be born with a pigment right here on this bottom layer. And they would all be born the same way. Everybody has the that make ?. In the people who have blue eyes, their ? are just not activated to produce the ? and that's determined by their genes. In babies who go on to have brown eyes by six months or a year, their genes have determined that their ? would produce ? and that happens over the first year of life. And babies who go on to have blue eyes, their ? are not programmed by the genes to produce ?. Their eyes will remian blue as they were a birth.

So, how many ? are stack in there, how much the light has to do to get through all those ? were also impact and they will create shades of greens and blues and browns and hazels, because the light is bouncing round a lot. So, this is actually across races. This is the normal development cycle of the eye. So, a baby who will have dark pigment in skin and dark with pigment eyes, I say, the one year mark can be born with blue eyes. Simply, because the ? has not yet been generated in the tissues of the ?
1

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  • wukeyu123

HW
Hi,   CCTV coverner, for why tell me why. This weel we would seek to the question about baby eye color. The question was why are most babies born with blue eyes. And I wasn't sure that is a ture statement, but it is in factor a ture statement. Actually we think most babies are, I don't have exact number for you. As understand why you have to understand where the color of eye comes from. The color of the eye is determined by pigment which is color part goes and back of the iries. And pigment in the main tissue of the iries, and these developed actually seperatly. So when a baby is born, the pigment in the back part of the iries, of the healthy iries, is already formed. And pigment in the main tissue of the iries isn't. This pigment is called  mailent. A baby would be born with pigment right here on this buttom layout. And they would all be born in the same way, everybody has the cells that make now and then. In the people who have blue eyes, those cells are just not activity to produce them now and then. And that's determined by their genes. In babies who go on to have brown eyes by six months or a year . Their genes have determined that the cells would produced mailent, and that happens over that first year or late. In babies who go on to have blue eyes, their cells are not programmed by the genes produced now and then. And their eyes will remain blue as they were at birth, so how many cells are stacked in there, how hard the light, how much the light has to do the get though all the cells will also impact and recreat its shapes. Of greens and blues and browns and hezos, because the light is bouncing around a lot. So this is actually a cross races, this is a normal development cycle of the eye. so a baby who will have darkly pigment in skin and darkly pigment in the eyes, I say the one year mark can be born with blue eyes, simply because the mailent has not yet been generated in the tissues of the iries.
1

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  • wukeyu123

实现无障碍英语沟通

Homework

本帖最后由 wukeyu123 于 2009-8-4 07:50 编辑

Hi, it’s Kasey-Dee Gardner for Why Tell Me Why. This week we received a question about baby eye color. The question was: why are most babies born with blue eyes. And I wasn’t sure if that’s a true statement, but it is in fact a true statement.

Actually we think most babies are, I don’t have an exact number for you, and to understand why, you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back part of the iris and pigment in the main tissue of the iris and these develop actually separately. So when a baby is born, the pigment in the back part of the iris, of a healthy iris, is already formed and the pigment in the main tissue of the iris isn’t. This pigment is called melanin. A baby would be born with pigment right here on this bottom layer. And they would all be born in the same way. Everybody has the cells that make melanin. In the people who have blue eyes, those cells are just not activated to produce the melanin, and that’s determined by their genes. And babies who go on to have brown eyes by six months or a year, their genes have determined that their cells will produce melanin, and that happens over that first year of life. And babies who go on to have blue eyes, their cells are not programmed by the genes to produce melanin. And their eyes will remain blue as they were at birth. So how many cells are stacked in there, how much the light has to do to get through all those cells will also impact and it will create shades of greens and blues and browns and hazels because the light is bouncing around a lot. So this is actually a cross races. This is the normal development, cycle of the eye, so a baby who will have darkly pigment in skin and darkly pigment in eyes, I say the one year mark can be born with blue eyes simply because the melanin has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

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HW
Hi, it’s Kasey, for WhyTellMeWhy. This week we have received a question about baby eye color. The question was: why are most babies born with blue eyes. And I wasn’t sure if that’s a true statement, but it is in fact a true statement. Actually, we think most babies are, I don’t have an exact number for you, and to understand why, you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back part of the iris and pigment in the main tissue of the iris. And these develop actually separately. So when a baby is born the pigment in the back part of the iris, of a healthy iris, is already formed and the pigment in the main tissue of the iris isn’t. This pigment is called melanin. A baby would be born with pigment right here on this bottom layer. And they would all be born in the same way. Everybody has the cells that make melanin. In the people who have blue eyes, those cells are just not activated to produced the melanin, and that’s determined by their genes. And babies who go on to have brown eyes by six months or a year their genes have determined that their cells will produce melanin, and that happens over that first year of life. And babies who go on to have blue eyes, their cells are not programmed by the genes to produced melanin. And their eyes will remain blue as they were at birth. So how many cells are stacked in there, how much the light has to do to get through all those cells will also impact and it will create shades of greens and blues and browns and hazels because the light is bouncing around a lot. So this is actually a cross races this is the normal development, cycle of the eye, so a baby who will have darkly pigment in skin and darkly pigment in eyes, I say the one year mark can be born with blue eyes simply because the melanin has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

本帖最后由 juliavane 于 2009-8-3 17:26 编辑

HW
Hi,this is kasey's Gardner,for Why Tell Me Why.This week we've received a question about baby eye color.The question was:why are most babies born with blue eyes.And I wasn't sure if that's true statement,but it is infect a true statement.
Actually,we think most babies are,I don't have exact number for you,and to understand why,you have understand why where the color of the eye comes from.The color of the eye is determined by the pigment which is color particles  in the back part of iris and the pigment in the main tissue of the iris.And these develop actually separately.So when a baby is born,the pigment in the back part of iris,of a  healthy iris, is already formed and the pigment in the main tissue of the iris isn't.This pigment is called melanin.A baby would be born with pigment right here on this bottom layer.And they would be born in the same way.Everybody has the cells that make melanin.In the people have blue eyes those cells are just not activated to produce the melanin and that's determined by their genes.And babies who go on to have brown eyes by 6 months or a year,their genes have determined that their cells were produce melanin and that happens over that first year of life.And babies who go on to have blue eyes,their cells are not programmed by the genes to produce the melanin.And their eyes will remain blue as they were at birth.So how many cells are stacked in there,(how hard the light)how much the light light has to do to get through all those cells were also impact and it will create shades of greens and blues and browns and hazels because the light is bouncing around a lot.So this is actually a cross races,this is the normal development cycle of the eye,so a baby who will have darkly pigment in skin and darkly pigment in eyes,I say the one year mark can be born with blue eyes simply because melanin has not yet been generated in the tissues of the iris.
1

评分次数

  • wukeyu123

HW

hi ,It's Kasey-Dee Gardner for Why Tell Me Why. This week we've received the question about baby eye color. The question was “why are most babies born with blue eyes”.
And I wasn’t sure if that was a true statement, but it is in fact a true statement.
Actually we think most babies are, I don’ t have an exact number for you, and to understand why you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back of the iris. And pigment in the main tissue of the iris, and these develop actually separately. So when a baby is born, the pigment in the back part of the iris of the health iris is already formed, and the pigment in the main tissue of the iris isn’t. This pigment is called melanin. Baby would be born with pigment right here on this bottom area. And they would all be born in the same way. Everybody has the cells that makes melanin. In the people who has blue eyes, those cells are just not activated to produce the melanin. And that's not determined by their genes. In babies who go on to have brown eyes by six month for a year, their genes have determined that their cells will produce melanin and that happen over that first year of life. In babies who go on to have blue eyes, their cells are not programmed by the genes produce melanin. And their eyes will remain blue as they were birth.

So how many cells scatter in there, how hard the light, how much the lights have due to get through all those cells will also impact in recreated shapes. Of green and blue and brown and hazels, because of the light is bouncing around the light.
So this is actually across races?
Um, this is the, this is the normal development cycle of the eye.
So a baby who will have dark pigment skin, and dark pigment eyes.
Ah, I said that, one, one year mark can be born with blue eyes. Simply because the melanin has not yet been generated in the tissue of the iris.
1

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  • wukeyu123

每天半小时 轻松提高英语口语
HW

hi ,It's Kasey-Dee Gardner for Why Tell Me Why. This week we've received the question about baby eye color. The question was “why are most babies born with blue eyes”.
And I wasn’t sure if that was a true statement, but it is in fact a true statement.
Actually we think most babies are, I don’ t have an exact number for you, and to understand why you have to understand where the color of the eye comes from. The color of the eye is determined by the pigment which is color particles in the back of the iris. And pigment in the main tissue of the iris, and these develop actually separately. So when a baby is born, the pigment in the back part of the iris of the health iris is already formed, and the pigment in the main tissue of the iris isn’t. This pigment is called melanin. Baby would be born with pigment right here on this bottom area. And they would all be born in the same way. Everybody has the cells that makes melanin. In the people who has blue eyes, those cells are just not activated to produce the melanin. And that's not determined by their genes. In babies who go on to have brown eyes by six month for a year, their genes have determined that their cells will produce melanin and that happen over that first year of life. In babies who go on to have blue eyes, their cells are not programmed by the genes produce melanin. And their eyes will remain blue as they were birth.

So how many cells scatter in there, how hard the light, how much the lights have due to get through all those cells will also impact in recreated shapes. Of green and blue and brown and hazels, because of the light is bouncing around the light.
So this is actually across races?
Um, this is the, this is the normal development cycle of the eye.
So a baby who will have dark pigment skin, and dark pigment eyes.
Ah, I said that, one, one year mark can be born with blue eyes. Simply because the melanin has not yet been generated in the tissue of the iris.
1

评分次数

  • wukeyu123

HW
Hi,Kasey-Dee Gardner for Why,Tell Me Why.This week we received a question about baby eye color.The questionwas why are most babies born with blue eyes.And I wasn't sure that was a true statement.But it is in fact a true statement.
Actually we think most babies are,I don't have an exact number for you.Em,and to understand why,you'd have to understand where the color of the eye comes from.
The color of the eyes determined by the pigment which is color particles in the back part of the iris and pigment in the main tissue of the iris.And these develop actually separately.
So when a baby is born.The pigment in the back part of the iris,of a healthy iris is already formed.And the pigment in the main tissue of the iris isn't.This pigment is called melanin(黑色素).A baby would be born with pigment right here on this bottom layer.And they would all be born in the same way.Everybody has the cells that make melanin.In the people who have blue eyes,those cells are just not activated to produce the melanin.And that's determined by their genes.In babies who go on to have brown eyes by six months or a year,their genes have determined that their cells will produce melanin.And that happens over that first year of life.In babies who go on to have blue eyes,their cells are not programmed by the genes to produce melanin.And..Em..their eyes will remain blue as they were at birth.So how many cells are stuck in there and how hard the light,how much
the light has to do to get through all those cells will also impact and will create shades of greens,and blues,and browns,and hazals,because the light is bouncing around a lot.
So this is actually a crossraces.Ah,this is the normal development cycle of the eye.So a baby who will have darkly pigmented skin and darkly pigmented eyes,at say the one year mark can be born with blue eyes,simply because the melanin has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

口译专员推荐—>口译训练软件IPTAM口译通
Hi it's Kasey for whytellmewhy.This week we have received a question about baby eye color.The question was why are most babies born wit blue eyes.And I wasn't sure that's a true statement but it is in fact a true statement. Actually we think most babies are I don't have an exact number for you.And to understand why you have to understand where the color of the eye comes from.The color of the eye is determined by the pigment which is color particels in the back part of the iris and pigment in the main tissue of the iris.And these develop actually seperately . So when a baby is born the pigment in the back part of the iris of a healthy iris is already formed.And the pigment in the main tissue of the iris isn't this pigment is called melanin.A baby would be born with pigment right here on this bottom layer.And they would all be born in the same way.Everybody has the cells that make melanin.In the people who have blue eyes those cells are just not activated to produce the melanin,and that's determined by their genes. And babies who go on to have brown eyes by 6 months or a year.Their genes have determined that their cells will produce melanin and that happenes over that first year of life.And babies who go on to have blue eyes their cells are not programmed  by the genes to produce melanin.And their eyes will remain blue as they were at birth.So how many cells are stacked in there,how hard the light,how much the light has to do to get through all those cells will also impact and it will create shades of greens and blues and browns and hazles because the light is bouncing around a lot. So this is actually a cross races ,this is the normal develpment cycle of the eye.So a baby who will have darkly pigment in skin and darkly pigment in eyes as they the one year mark can be born with blue eyes,simply because the melanin has not yet been generated in the tissues of the iris.
1

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  • wukeyu123

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