Question

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. creates new alleles from dna competition for sunlight leads to taller trees. brings new alleles from other populations the dna of a snake changes to make its venom stronger. randomly selects alleles a grassfire randomly sweeps through a population of buffalo favors certain alleles done

Explanation:

For "A zebra migrates to join a different herd of zebras", migration of an individual from one population (herd) to another means it brings the alleles it carries from its original population to the new herd's gene pool. So the effect is "brings new alleles from other populations".

For "Competition for sunlight leads to taller trees", this is natural selection where the environment (competition for sunlight) favors alleles that lead to taller growth in trees, so it "favors certain alleles".

For "The DNA of a snake changes to make its venom stronger", a change in DNA (mutation) can create new alleles, so this "creates new alleles from DNA".

For "A grassfire randomly sweeps through a population of buffalo", such a random event that affects the population (like a natural disaster) can randomly select which individuals (and thus their alleles) survive, so it "randomly selects alleles".

Answer:

• A zebra migrates to join a different herd of zebras: brings new alleles from other populations
• Competition for sunlight leads to taller trees: favors certain alleles
• The DNA of a snake changes to make its venom stronger: creates new alleles from DNA
• A grassfire randomly sweeps through a population of buffalo: randomly selects alleles