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SPEAKER_00 Hey there and welcome to Life Noggin.
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SPEAKER_01 And I'm Sabrina from the YouTube channel Nerdy and Quirky.
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SPEAKER_00 And we're here to teach you a little bit about color blindness.
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SPEAKER_00 There's nothing I love more than seeing the sunset at the end of the day.
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SPEAKER_00 But for some people, these sunsets might not be so spectacular.
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SPEAKER_01 See, in the retina of our eyes, we have light-detecting cells called cones.
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SPEAKER_01 These cones contain three different types of photopigments, which are sensitive to different wavelengths of visible light.
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SPEAKER_01 And while the wavelengths detected by each cone tend to overlap, it is easy for us to categorize the cones as being red, green, or blue.
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SPEAKER_00 If you have normal color vision, your red, green, and blue cones are all working properly, and you'd be called a trichromat.
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SPEAKER_00 However, some people are dichromats, meaning that they only have two types of cones instead of three.
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SPEAKER_01 This typically affects about 2% of the male population, who are either missing their red or green cones.
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SPEAKER_01 These people can't distinguish between red, orange, yellow, and green, which definitely makes those sunsets a lot less interesting.
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SPEAKER_00 A more common form of colorblindness is called anomalous trichromacy, which affects about 6% of males.
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SPEAKER_00 And this is where the famous red-green colorblindness belongs.
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SPEAKER_00 People with this have all three types of cones, but some of the wavelengths covered by the green or red cones are shifted.
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SPEAKER_01 And if the wavelengths from the green cones are shifted, you can think of the person as being green-weak.
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SPEAKER_01 It'll be hard for them to notice small differences between red and green, but it's not as severe as dichromacy.
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SPEAKER_00 And since the red and green pigment genes are located on the X chromosome, men are much more likely to have colorblindness.
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SPEAKER_00 After all, women have two X chromosomes, so both would have to be defective for them to be colorblind.
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SPEAKER_01 So if you are a man watching this, take a look at this picture.
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SPEAKER_01 If you can see a 2 in the center, you probably have normal color vision.
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SPEAKER_01 But if not, you may want to go to the eye doctor to get officially tested.
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SPEAKER_00 Anyway, so tell me in the comments, if you had to describe the color green to someone who's colorblind, what would you say?
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SPEAKER_00 Do you have any experiences you'd like to share?
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SPEAKER_00 Let us know in the comment section below, and if not, tell us what you would like us to talk about next.
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SPEAKER_00 And this has been Life Noggin.
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SPEAKER_00 Don't forget to keep on thinking!