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Colour vision

Colour vision defects

mild to severe impairment in the ability to discriminate or differentiate hues. This disorder may be acquired as a result of diseases of the cones or x chromosome-linked where there is an abnormality but not a complete absence of one of the cone pigments.


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Question

Colour Blindness is an X-linked recessive trait. If a female has normal vision, and to have colour-bind children, she would either have to be a carrier of the recessive gene, and/or be ...

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by 2Loula
Tue Mar 13, 2007 1:10 pm
 
Forum: Genetics
Topic: Question
Replies: 8
Views: 1155

Evolution - Natural Selection FLAWED?

... the environment, such as hunger and disease. Darwin adapted Malthus's vision of a fierce struggle for survival among human beings to nature at ... are often surprisingly diverse. In the house mouse, nearly every coat-colour gene has some effect on body size. Out of seventeen x-ray induced ...

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by Thermopylae
Sun Feb 18, 2007 3:52 pm
 
Forum: Evolution
Topic: Evolution - Natural Selection FLAWED?
Replies: 9
Views: 4432

Who did we evolve from?

... lead to a new species. Also, if man did evolve why is it that we have colour vision? There is no need what so ever for colour vision. So if we did evolve then why did we ...

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by alextemplet
Sat May 06, 2006 12:30 am
 
Forum: Evolution
Topic: Who did we evolve from?
Replies: 157
Views: 19257

Who did we evolve from?

... lead to a new species. Also, if man did evolve why is it that we have colour vision? There is no need what so ever for colour vision. So if we did evolve then why did we ...

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by Leben24
Fri May 05, 2006 5:34 pm
 
Forum: Evolution
Topic: Who did we evolve from?
Replies: 157
Views: 19257

MOSAIC!!

... is inactivated). For example, female haterozygous carrier for red-green colour blindness will have patches of retinal cells with defective colour vision interspersed among patches of normal vision. In Klinefelter syndrome (XXY), the male ...

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by sham
Thu Mar 16, 2006 2:40 am
 
Forum: Genetics
Topic: MOSAIC!!
Replies: 6
Views: 1118
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