Can you help me with HardyWeinberg Problems?
Moderators: honeev, Leonid, amiradm, BioTeam

 Garter
 Posts: 1
 Joined: Tue Nov 09, 2010 4:31 pm
Can you help me with HardyWeinberg Problems?
I want more general help than with a specific problem. I don't really understand how to do HW problems when they give you phenotype.
For example: if it tells me that 360 out of 1,000 in a population display the recessive phenotype, how would I find the numbers of individuals expected to be homozygous dominant and heterozygous for the trait?
I tried making the 360 => .36 in the P+Q=1 equation, but then I don't know how to find the 2PG (for the hets) because the numbers will no longer add up to 1 in the p^2+2pq+q^2 equation. Is .36 really the q^2? And then I have to find normal q by square rooting? Or am I on entirely the wrong track?
Also: if they tell me that 510 out of 1,000 show the dominant phenotype, how do I find the numbers of individuals for each genotype?
Please help tell me HOW to do these problems and not what the answers are...thank you!
For example: if it tells me that 360 out of 1,000 in a population display the recessive phenotype, how would I find the numbers of individuals expected to be homozygous dominant and heterozygous for the trait?
I tried making the 360 => .36 in the P+Q=1 equation, but then I don't know how to find the 2PG (for the hets) because the numbers will no longer add up to 1 in the p^2+2pq+q^2 equation. Is .36 really the q^2? And then I have to find normal q by square rooting? Or am I on entirely the wrong track?
Also: if they tell me that 510 out of 1,000 show the dominant phenotype, how do I find the numbers of individuals for each genotype?
Please help tell me HOW to do these problems and not what the answers are...thank you!