Hardy-weinberg equation :D

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

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Oscerot
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Post by Oscerot » Mon Jan 15, 2007 4:48 pm

Okay I have a question. I have a "snow day" today, so I thought I'd finish up my biology homework. Here's a question;

Twenty-one percent of a population is homozygous dominant, 50 percent is heterozygous, and 29 percent is recessive. What percentage of the next generation is predicted to be recessive. Explain


So here are the variables I got;

p^2 = 0.21
q^2 = 0.29
2pg = 0.50

So now I am lost as to how to get the second generation. Help?

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MrMistery
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Post by MrMistery » Mon Jan 15, 2007 9:11 pm

well it depends on the way the species reproduces: sexually, asexually.

Generally, if the species is in HW equilibrium(which never happens) the next generation will have the same gene percentages. so the answer should be 29%
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Oscerot
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Post by Oscerot » Mon Jan 15, 2007 9:41 pm

I thought so too. There isn't enough information given so I at first assumed that it must be in equillibrium.

Here's another one;

The allele for a hitchikers thumb is dominant over a straight thumb. In a pop. of 1,000 people, 510 show the dominant phenotype. How many individuals would you expect for each of the three possible genotypes for this trait?

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