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Colour blindness

Colour blindness

a sex-linked inherited condition where there is an inability to distinguish colours. Very few women are colour blind, but up to 10% of all men have some degree of colour blindness. The most common for is red-green colour blindness. The second most common is blue-yellow.

Inheritance: sex-linked (X chromosome).


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Natural selection is proven wrong

... to this for well-documented reasons, but a clear trend can be seen: colour blindness is relatively common, because it is almost harmless; Duchenne muscular dystrophy ...

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by biohazard
Thu Apr 23, 2009 10:53 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16334

Help

... c) implies that the gene is on one of the sex chromosomes d) means that colour blindness occurs only in women e) is another term for sex limited d 2) Loci A and B are unlinked. ...

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by chousta
Sat Aug 23, 2008 7:14 am
 
Forum: Genetics
Topic: Help
Replies: 1
Views: 676

Another BIOLOGY ?

1. The mother must carry the colour blindness gene a. 1/1 b. 1/4

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by woolleyy
Wed Nov 28, 2007 12:21 pm
 
Forum: Genetics
Topic: Another BIOLOGY ?
Replies: 1
Views: 626

Question

... disease carried on the X chromosome, if the female does not have the colour-blindness allele at all, there is no way any of her children will be colourblind (though any ...

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by Revenged
Tue Mar 13, 2007 8:55 pm
 
Forum: Genetics
Topic: Question
Replies: 8
Views: 1155

Re: Question

A female who does not carry the color blindness allel has children with a male who is color blond. What proportion of their children will be colorblind? all- 1/4-1/2-or 3/4 Colour blindness is a X-linked recessive condition... In this case the parents alleles are: ...

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by Revenged
Tue Mar 13, 2007 8:53 pm
 
Forum: Genetics
Topic: Question
Replies: 8
Views: 1155
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