Question

identifying the results of the mechanisms that influence gene pools
read each example and decide what the resulting effect on the gene pool of that population would be.
a zebra migrates to join a different herd of zebras.
competition for sunlight leads to taller trees.
the dna of a snake changes to make its venom stronger.
a grassfire randomly sweeps through a population of buffalo

Explanation:

• When a zebra migrates to join a different herd of zebras, it brings new alleles from other populations. This is an example of gene flow.
• Competition for sunlight leading to taller trees favors certain alleles. This is an example of natural selection.
• The DNA of a snake changing to make its venom stronger creates new alleles from DNA. This is an example of mutation.
• A grassfire randomly sweeping through a population of buffalo randomly selects alleles. This is an example of genetic drift.

Answer:

1. brings new alleles from other populations
2. favors certain alleles
3. creates new alleles from DNA
4. randomly selects alleles