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kingryan
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kingryan
4,193 posts
Farmer

Hello,
I am colourblind. For all those who don't know what it is I will tell you.

Colourblindness means that I am unable to distinguish between different colours such as brown and green, blue and purple.

Being Colourblind doesn't affect my daily life that much, but sometimes I get mixed up and will colour something in wrong or do something like that.

For example, today at school when I was making a poster, I accidentally coloured in something brown instead of red.

To detirmine whether someone is colourblind there is a simple test. It is called a Ishihara Colour Blindness Test.

Here is an example of one:
http://www.admit-one.net/webimages/colorblind.jpg

I am colourblind and can see a 5. Most un-colourblind people cannot see it.

I cannot see anything in this one...
http://aphrabehn.files.wordpress.com/2007/04/ishihara2.gif
What number is it?

  • 45 Replies
Agent_86
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Agent_86
2,127 posts
Nomad

just as a statement - colorblindness is a recesive trait found only in males. Females can not be colorblind
Actually it IS possible to have a female person with colorblindness - her father has to be clorblind and her mother has to be a carrier/colorblind.
howlett
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howlett
2,278 posts
Nomad

Of course its possible for females to be colorblind I know one that is =)

Agent_86
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Agent_86
2,127 posts
Nomad

Well, for all of us guys with colorblindness(me included), it's your mom's fault that you're colorblind. And you will pass the trait to all your daughters(but not sons).

howlett
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howlett
2,278 posts
Nomad

Really?Thats cool I never noticed that.Are you sure???

Cenere
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Cenere
13,656 posts
Jester

Yes, Howlett.
It is because it is located on one of the female cromosones kow as x). Because it is a weak trait, it will be dominated by the other x in a female, but a male only has that one x, and as the y is submissive, the trait will probably shine through.

Agent_86
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Agent_86
2,127 posts
Nomad

Look, this is how the chromosomes work:

Male
XY

Female
XX

Now only the x chromosomes carry traits like colorblindness.

Cenere
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Cenere
13,656 posts
Jester

Oh, all scientific!!

Trait: 1

Male w/o trait: X Y
Female w/o trait: X X
Those two would have children without the trait.

Male w trait: X1 Y
Female w/o trait: X X
Children: X1 X, X1 X, X Y, X Y. The girls will carry the trait, while nothing happens to the boys.

Male w/o tarit: X Y
Female w trait: X1 X
Children: X1 X, X X, X1 Y, X Y. One of the boys will have the trait, while one of the girls will carry it.

Male w trait: X1 Y
Female w trait: X1 X
Children: X1 X1, X1 X, X1 Y, X Y. One girl with trait, one boy with trait, one girl who carries the trait, a boy without the trait.

Agent_86
offline
Agent_86
2,127 posts
Nomad

What cenere said.
I just didn't want to get all scientific on everyone.

Cenere
offline
Cenere
13,656 posts
Jester

No, but I love it. Finally something I learned in high school that can be useful.

But it should explain it. At least the "explaination part" does.

Agent_86
offline
Agent_86
2,127 posts
Nomad

You forgot
X1 Y
X1 X1

=)

Zophia
offline
Zophia
9,424 posts
Scribe

Oh genetics.

I see the 5 more clearly than the 2, but I think it's because of the size of the blobs... Could see both the 7 and the 26 as well.

howlett
offline
howlett
2,278 posts
Nomad

7 and 26 I can't see them where are they?

Gantic
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Gantic
11,889 posts
King

I'm willing to bet that nearsighted people can see the 5 easier.

7 and 26 I can't see them where are they?

On page 2?
howlett
offline
howlett
2,278 posts
Nomad

Oh right yea I see the 7 and 26, lol.At first I thought the were on the first post.

Cenere
offline
Cenere
13,656 posts
Jester

Darn!

X1 Y
X1 X1
: X1 X1, X1 X1, X1 Y, X1 Y. All colour blind, or at least with a high chance of being so (as genes can be weird). But would be a nice family without anyone being able to see the numbers?

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