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Hw HELP-frequency

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Hw HELP-frequency

Postby biologicallychallenged213 » Tue Feb 07, 2006 4:06 am

In a population of 70 slugs, we have 20 indidviduals exhibiting the very slimy trait, which is caused bu the dominant allele (S=very slimy, s=not so slimy). The rest are not so slimy. What is the frequency of p?
Please i need the answer its due tomorrow!!!!!!
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Postby army » Tue Feb 07, 2006 9:23 am

Uhs.. you mean the frequency of S or s?
It's likely just a simple matter...
p2+pq+q2=1, remember that hardy-weinberg formula? I think ur problem can be solved with that.
Let me try...

you say 50 slugs are not so slimy, it means there are 50 slugs have ss genotype.
50/70=.... that is the frequency of ss
the frequency of s gene is.. v(50/70)... I mean the squareroot of the result above.
Next, you can find out the S gene frequency and also SS as well, by substituting q (in the formula) with the result of v(50/70)
so:
p2+p(v(50/70))+(50/70)=1
I guess you can finish this equality
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