Hardyweinberg

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Really? I would have thought NO. In order to be at Hardy-Weinberg equilibrium doesn't the population HAVE to be isolated from all other populations?....in order to eliminate gene flow?
 
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it can be confusing, but keep in mind that hardy-weinberg tries to describe those populations that aren't evolving or changing.

speciation is likely to occur if a population is isolated. the isolated population will eventually lead to genetic differences due to adaptions to their particular environment, thus allowing for a change in the gene pool.
 
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Yes, if a SMALL population is isolated, it will lead to speciation.

However, the population also has to be large..so isolation + large population leads to no change in the gene pool.

Also can't be any mutations, no net migration in or out(gene flow), no natural selection, and cannot have any sexual selection (needs to be random mating to be in hardy weinberg equilibrium)

Another way to look at "isolated" is the part that states there can't be any net migration in or out.

If a large population is isolated, it's easier to keep net migration at 0. If theres a lot of populations around it, it's much harder to keep individuals from coming in and going out
 
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Baylor2011 said:
Yes, if a SMALL population is isolated, it will lead to speciation.

However, the population also has to be large..so isolation + large population leads to no change in the gene pool.

Also can't be any mutations, no net migration in or out(gene flow), no natural selection, and cannot have any sexual selection (needs to be random mating to be in hardy weinberg equilibrium)

Another way to look at "isolated" is the part that states there can't be any net migration in or out.

If a large population is isolated, it's easier to keep net migration at 0. If theres a lot of populations around it, it's much harder to keep individuals from coming in and going out
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well this makes sense. but now i'm confused on something. destroyer states "no isolation" as part of a large population, however cliffs excludes it. has anyone had a question like this on the dat? seems so simple but the 2 sources i'm using for the bio section are skewed.....🙁
 
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fever103 said:
well this makes sense. but now i'm confused on something. destroyer states "no isolation" as part of a large population, however cliffs excludes it. has anyone had a question like this on the dat? seems so simple but the 2 sources i'm using for the bio section are skewed.....🙁
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Try using the general internet; it is a good source.
 
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fever103 said:
well this makes sense. but now i'm confused on something. destroyer states "no isolation" as part of a large population, however cliffs excludes it. has anyone had a question like this on the dat? seems so simple but the 2 sources i'm using for the bio section are skewed.....🙁
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I'm using cliffs as well, 1 of the conditions for HW is "no emigration and immigration". I'm assuming this means that the population is isolated
 
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Two ideas depending on what you are referring to as being isolated.

The population must be isolated. Immigration and emmigration will cause the gene frequencies in the population to fluctuate.

Individuals cannot be isolated. Selective breeding and inbreeding causes inconsistencies in the predicted frequencies of homo/heterozygotes.

So, the answer to whether "no isolation" is an assumption depends on what type of isolation you're referring to.
 
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rippinitez said:
Is "no isolation" one of the conditions of Hardy-Weinberg equilibrium?
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In order for equilibrium to occur, you don't want changes in gene frequencies. Thus:

1. all traits must be neutral (no natural selection)
2. mutations do not occur
3. population must be isolated from other populations (no gene flow)
4. population must be large (no genetic drift)
5. mating is random

These facts can also be found in AP Cliffs 2010, page 134 =)
 
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The question is from Destroyer and simply lists "no isolation" as one of the answer choices. So it seems as though the question is poorly worded.
 
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