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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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Mendel crossing with colour blindness (Probability)

... in this problem: "In Oslo 18121 school children were tested for colour blindess. These are the results: Male: 8324 not colour-blind, 725 ... ? colour-blind. Determine the number of colour-blind females if colour-blindness is caused by a monogene recessive X-chromosomal gene." My ...

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by tomkoolen
Thu Jun 13, 2013 10:56 pm
 
Forum: Genetics
Topic: Mendel crossing with colour blindness (Probability)
Replies: 0
Views: 937

Re: UNILATERAL red-green color blindness

Unilateral colour vision defects are most commonly associated with retinal pathology or compressive lesions involving the optic nerve/optic tract/occipital lobe of the brain. If the unilateral colour vision defect was detected ...

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by Curio
Wed Mar 03, 2010 2:37 pm
 
Forum: Genetics
Topic: UNILATERAL red-green color blindness
Replies: 7
Views: 12828

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: 247
Views: 653690

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: 3230

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: 1246
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