## Hardy-weinberg equation :D

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

Oscerot
Coral
Posts: 171
Joined: Wed Dec 13, 2006 12:21 am
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?

MrMistery
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
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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%
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

Oscerot
Coral
Posts: 171
Joined: Wed Dec 13, 2006 12:21 am
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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