A population that is infinitely large and in which mating is completely random is mostly likely to:

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BlackTom AI · Accepted Answer

Question restatement: A population that is infinitely large and in which mating is completely random is mostly likely to:

Options:
 a. experience more gene flow
 b. have recessive alleles
 c. not evolve
 d. increase migrations
 e. go extinct

Now, let's examine each option one by one with careful reasoning:

Option a: experience more gene flow. Gene flow refers to the transfer of alleles among populations via migration. In this scenario, the population is described as infinitely large and randomly mating, but there is no mention of individuals migrating between populations. Therefore, we should not infer increased gene flow solely from infinite size and random mating. This option is not supported by the given conditions.

Option b: have recessive alleles. Every diploid population harbors recessive alleles, but the statement implies a change or a characteristic that is specifically more likely under these conditions. An infinitely large population with random mating under Hardy-Weinberg equilibrium does not inherently increase the presence or frequency of recessive alleles relative to other alleles; their presence is determined by allele frequencies, not by the stated conditions alone. This option is not necessarily true.

Option c: not evolve. In an infinitely large population with random mating, assuming no mutation, no migration, and no selection, allele frequencies remain constant from generation to generation—this is the Hardy-Weinberg principle. Large population size also minimizes genetic drift. Therefore, under these ideal conditions, the population is not expected to evolve. This option is consistent with the principles of population genetics under the given assumptions and is the most accurate choice.

Option d: increase migrations. Migration implies movement of individuals between populations, which would introduce gene flow. However, the question describes a single large population with random mating and does not mention any ongoing migration between populations. Therefore, we cannot conclude there is an increase in migrations based on the given information. This option is unsupported.

Option e: go extinct. An infinitely large population is, by definition, not at risk of extinction due to random demographic stochasticity. The immense population size makes extinction extremely unlikely, so this option contradicts the scenario. This option is incorrect.

In summary, evaluating each option against the stated conditions shows that only option c aligns with the expectations of an infinitely large, randomly mating population under Hardy-Weinberg assumptions, implying no evolution over time. The other choices rely on factors (migration, changes in allele presence, extinction) that are not implied by the scenario and thus are not correct interpretations of the situation.

BIO 181 (001&002) FALL 2025 FA25: Cumulative Exam 4 covers the most important content from Units 1-4: You can do this!!! : ) [Grade is out of 150/900 pts, the same am't of pts for the active learning "easy points" classwork.]

A population that is infinitely large and in which mating is completely random is mostly likely to:

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