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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: 1228

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: 14446

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: 689017


... 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: 3767

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: 1351
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