Genetics and Hardy Weinberg Equilibrium

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

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
OoBiologyoO
Garter
Garter
Posts: 12
Joined: Mon Sep 25, 2006 6:43 pm

Genetics and Hardy Weinberg Equilibrium

Post by OoBiologyoO » Wed Dec 13, 2006 4:43 pm

Hello!

If 49% of a population is homozygous recessive, what is the allele frequency of the dominant allele?

The way I would do it is:
49% represents q^2, so p^2 is 51%, => square root of 51 = 7% approximately.

Would that be correct?

Thanks!

OoBiologyoO
Garter
Garter
Posts: 12
Joined: Mon Sep 25, 2006 6:43 pm

Post by OoBiologyoO » Thu Dec 14, 2006 2:48 pm

Ok well, apparently 51% and 7% are not correct answers. So I have no idea what the right answer is...

Any ideas?

OoBiologyoO
Garter
Garter
Posts: 12
Joined: Mon Sep 25, 2006 6:43 pm

Post by OoBiologyoO » Thu Dec 14, 2006 3:06 pm

Nevermind, the answer is 3% I am pretty sure.

User avatar
mith
Inland Taipan
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:

Post by mith » Thu Dec 14, 2006 3:30 pm

P+Q=1...so take sqrt of q.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Thu Dec 14, 2006 4:45 pm

yeah, dave is right. take the square root of 49/100 and you get 7/10. and since p+q=1 then the frequency of p is 1-0.7=0.3(which means 30%, not 3%)

Hey dave, remember that HW equation we scrwed up last year for like a week until we finally solved it?
"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

User avatar
mith
Inland Taipan
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:

Post by mith » Thu Dec 14, 2006 11:37 pm

lol, that poor guy
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

Post Reply

Who is online

Users browsing this forum: No registered users and 7 guests