AP Bio 3.4 Evolution
AP Bio 3.4 Evolution. What does gene flow do?
|Evolve in changing environment||Populations continue to evolve|
|Test Prep||AP Biology|
instead of mowing the lawn like you promised.
When genes migrate, stuff usually…happens.
However, most DNA mutations occur naturally and not because of gene flow. [Man transforms into the Hulk]
When a cell divides, it makes a copy of the DNA.
It’s not entirely like “cut and paste”.
More like “keep your fingers crossed” and hope for a perfect copy. [Girl crossing her fingers]
Otherwise, you have a mutation.
Gene flow is not the culprit here.
Answer “A’ is wrong.
How about “B”?
Well, in the case of human organisms, we normally select mates on a non-random basis… based [Girl flirts with guy sat on a bench]
instead on easily observable traits.
Fortunately, as we mature, more thought will go into the non-random selection process.
It’s all about the vibes.
And not gene flow.
“B” is incorrect.
With natural selection, certain phenotypes are better able than others to contribute [Man bench pressing]
their genes to the next generation.
They’re more fit and uh…pumped up for action. [People working out in a gym]
The end result is a gradual change in the gene frequencies of that population.
None of which is caused by gene flow.
“C” is out.
As for “D”, gene flow is the transfer of alleles from one population to [Alleles transfer from one circle to another]
This transfer knocks the Hardy-Weinberg equilibrium out of whack, because it could change the
And, when those frequencies are the least bit disrupted…well, prepare for some potentially
hairy moments. [Man transforms into a caveman]
“D” is definitely the correct answer.
A word to the wise: you may want to avoid the…deep end of the gene pool… [Man jumps into deep end of a gene pool]