## Hardy weinburg equation please HELP!!!!!!!!!!!!!!!!!!!!!!!!!

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

Moderators: honeev, Leonid, amiradm, BioTeam

confuzd441
Garter
Posts: 3
Joined: Wed May 25, 2005 4:50 pm

### Hardy weinburg equation please HELP!!!!!!!!!!!!!!!!!!!!!!!!!

if 48% of a population carry dominant H gene using hardy weinberg what % have Hh??
thats all the info i have
please resond asap
Last edited by confuzd441 on Wed May 25, 2005 5:24 pm, edited 1 time in total.

mith
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:
p=48
q=52
pq=?
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

confuzd441
Garter
Posts: 3
Joined: Wed May 25, 2005 4:50 pm
yeah i know stupid huh??
i get that q= 0.52 but what nxt??

mith
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:
pq=?
Read the post.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

victor
King Cobra
Posts: 2668
Joined: Sat Apr 30, 2005 12:01 pm
Location: Yogyakarta, Indonesia..
Contact:

### Hardy-Weinberg mechanism of evolution

48% population are dominant H (homozygotic)=0.48= p (quadrat)
p=about 0.7
p+q=1
(0.7) + q = 1
q=0.3
then how many Hh?
According to the equation= p(quadrat) + 2pq + q(quadrat)
so, Hh is 2pq
=2x(0.7)x(0.3)
=0.42
=about 42%

MrMistery
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:
Since this was a homework related question i think mithril was trying to make him get the answer himself... He wasn't succeding much
"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

mith
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:
whoops, just realized I forgot the 2 infront of the pq.
@victor, he said that 48% carry the gene not that they're homozygous for it. i.e. it's allele frequency
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

MrMistery
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:
@mithril
From what i can tell victor is right. Hrady weinberg 101
HH- p*p
Hh-2pq
hh-q*q
So to find out what p is you just need to make the sqare root of 48
Regards
ANdrew
"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

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

### Re: Hardy weinburg equation please HELP!!!!!!!!!!!!!!!!!!!!!

confuzd441 wrote:if 48% of a population carry dominant H gene using hardy weinberg

that just means there are 48% with the H gene, not that 48% are p^2.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

zami'87.
Coral
Posts: 257
Joined: Sat Mar 05, 2005 6:56 pm
Location: Serbia

### Re: Hardy weinburg equation please HELP!!!!!!!!!!!!!!!!!!!!!

I think that here p=0.48 alel freq cause p^2 is freq of diseased.
p=0.48,q=1-p,2pq=2*0.48*0.52
correct me if i'm wrong

MrMistery
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:
Ok guys, here it is:
48% carry H gene. That means that the other 52% do not have the H dominant gene, which means that they are homozygotus recessive. From here we can find out the value of q(the frequence of h recessive gene) since hh=q^2. Using windows calculator we get q=0.7211. Since q+p=1 then p=0.2789.
Now the frequence of Hh heterozygotus is: 2pq=2*0.7211*0.2789=0.4022. So 40,22% of your individuals are heterozygotus.
Sorry i missread it the first time
PS: I hate this populational genetics things, never could stand them!!
Regards,
Andrew
"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

zami'87.
Coral
Posts: 257
Joined: Sat Mar 05, 2005 6:56 pm
Location: Serbia
nice job Andrew!
I got 0.4992

### Who is online

Users browsing this forum: No registered users and 0 guests