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Heriditory genetic disorders.....

Paladin · 2001-07-18 22:31:00

Or more specifically hemophilia and colorblindness (or coloUrblindness ). This is my attempt to add a little to this new and cool sciency board Basically this is a query. Im pretty well up to date on most os the chromosomal (tha a word?) possibilities of these heriditory disorders, but there are a few things that I want…

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#32 16-08-2001 12:25am
Bob the Unlucky Octopus

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Ahhhhh...I see what might be the problem- you seem to be confusing the term "X-linkage" with the linkage of two conditions. If a condition is X-linked, that means that it has a strongly expressed X-chromosomal component. Ie- it's more likely to be expressed strongly in men as they only have one X chromosome- with women acting as carriers. Both hemophilia and colorblindness traits are X-linked.

If two conditions are linked (such as cystic fibrosis and alveolar polycystaemia), it means that the expression of one condition is often accompanied by the other. Very often, if one of the faulty genes is expressed, so will the other. However, hemophilia and colorblindness are not linked to each other. Linked to the X chromosome, but not to each other. Does that make it any clearer?

Bob the Unlucky Octopus

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