Thursday, 11 October 2007

genetics - Possible Genotypes of 4 Alleles of Adh

Those Hardy-Weinberg equations are the general case, used for only two alleles. This question is basically answered here, for three alleles; you've got a situation of four alleles. That means you need to have:



(p+q+r+s)2=1



Where p, q, r, and s are the frequencies of your respective alleles. This expands out to the rather unwieldy:



p2+2pq+2pr+2ps+q2+2qr+2qs+r2+2rs+s2=1



Now it becomes a plug 'n chug assignment; simply assign the frequencies and calculate.




Assuming p is Adh-1, q is Adh-2, etc., p2=0.0121, 2pq=0.1848, and so on.


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