This question tests understanding of deviations from Hardy-Weinberg equilibrium due to inbreeding. The Hardy-Weinberg principle states that random mating, no selection, no mutation, no migration, and large size preserve genotype ratios. In this wolf program, pairing relatives increases homozygotes without major allele changes. Choice D correctly identifies inbreeding as the cause, violating random mating. Choice B is incorrect because favoring heterozygotes would decrease, not increase, homozygosity. A transferable check for Hardy-Weinberg assumptions is to calculate inbreeding coefficients; homozygote excess suggests nonrandom mating. Pedigree analysis can quantify inbreeding levels.

This question tests understanding of deviations from Hardy-Weinberg equilibrium due to nonrandom mating. The Hardy-Weinberg principle states that random mating, no selection, no mutation, no migration, and large size maintain genotype expectations. In this pigeon population, preferential mating based on plumage linked to genotypes causes heterozygote deficit. Choice D correctly identifies assortative mating as the cause, violating the random mating assumption. Choice B is incorrect because drift in large populations is minimal and not consistent. A transferable check for Hardy-Weinberg assumptions is to assess mate choice; homozygote excess suggests assortative mating. Behavioral data can link mating to genotypes.

This question tests the ability to apply the Hardy-Weinberg principle to predict changes in allele frequencies when one of its assumptions is violated. The Hardy-Weinberg principle states that in a large, randomly mating population with no selection, mutation, or migration, allele and genotype frequencies remain constant across generations. In this scenario, the bird population initially meets Hardy-Weinberg expectations, but consistent immigration from a nearby population with different allele frequencies introduces gene flow, violating the no-migration assumption. The correct prediction, choice A, follows the principle because gene flow can alter allele frequencies in the focal population, shifting them toward those of the source population. A common distractor, choice D, fails by misconstruing that Hardy-Weinberg equilibrium persists despite migration, ignoring that migration prevents equilibrium by changing allele frequencies. To recognize Hardy-Weinberg assumptions in practice, check for evidence of gene flow, such as immigration data, which would invalidate predictions of constant frequencies. Additionally, confirm other assumptions like large population size and no selection are met to isolate the violating factor.

This question tests understanding of deviations from Hardy-Weinberg equilibrium due to genetic drift in small populations. The Hardy-Weinberg principle states that in a very large, randomly mating population with no selection, mutation, or migration, allele frequencies remain stable. In this rodent colony, small founding sizes lead to differing allele frequencies across replicates despite identical conditions. Choice A correctly identifies genetic drift due to small size as the cause, violating the large population assumption. Choice B is incorrect because directional selection would produce consistent, not variable, trajectories across replicates. A transferable check for Hardy-Weinberg assumptions is to compare allele frequencies across replicate populations; high variance indicates drift. Small effective sizes amplify random sampling effects.

This question tests understanding of deviations from Hardy-Weinberg equilibrium due to fecundity selection. The Hardy-Weinberg principle states that in a large, randomly mating population with no selection, mutation, or migration, genotype frequencies match allele-based expectations. In this mammal population, nn has reduced reproductive success, leading to underrepresentation in breeders. Choice D correctly identifies selection against nn as the cause, violating the no-selection assumption. Choice B is incorrect because random mating does not increase homozygote frequencies above q². A transferable check for Hardy-Weinberg assumptions is to compare frequencies across reproductive stages; deficits in breeders suggest fecundity selection. Linking traits to fitness can identify selective mechanisms.

This question tests conditions that disrupt Hardy-Weinberg equilibrium, specifically mutation. The Hardy-Weinberg principle states that in a large population with random union of gametes, no selection, no migration, and no mutation, allele and genotype frequencies remain stable. In this bacterial chemostat, recurrent mutation from g to G introduces new alleles, potentially shifting frequencies despite large size and no selection. Choice D correctly identifies recurrent mutation as the disrupting factor, violating the no-mutation assumption. Choice B is incorrect because large population size supports equilibrium by reducing drift, not disrupting it. A transferable check for Hardy-Weinberg assumptions is to sequence for new variants; unexpected allele introductions suggest mutation. Monitoring frequency changes without other forces can isolate mutational effects.

This question tests understanding of deviations from Hardy-Weinberg equilibrium due to sexual selection. The Hardy-Weinberg principle states that random mating, no selection (including sexual), no mutation, no migration, and large size maintain equilibria. In this butterfly population, Zz higher mating success causes adult heterozygote excess. Choice D correctly identifies sexual selection as the cause, violating assumptions. Choice B is incorrect because drift in large populations is not predictable. A transferable check for Hardy-Weinberg assumptions is to evaluate reproductive success; heterozygote excess in adults suggests sexual selection. Comparing larval and adult frequencies reveals biases.

This question tests predictions about allele frequencies under selection in Hardy-Weinberg context. The Hardy-Weinberg principle states that no selection, random mating, no mutation, no migration, and large size keep allele frequencies constant. In this plant scenario, uu has lower seed production, leading to decreasing q(u). Choice A correctly predicts q(u) decrease if fitness differences persist, consistent with selection violation. Choice B is incorrect because similar germination does not prevent overall fitness effects on frequencies. A transferable check for Hardy-Weinberg assumptions is to measure fitness components; directional changes indicate selection. Tracking alleles over time reveals selection strength.

This question tests understanding of conditions that disrupt Hardy-Weinberg equilibrium, specifically migration. The Hardy-Weinberg principle states that in a large, randomly mating population with no selection, mutation, or migration, allele and genotype frequencies remain constant. In this fruit fly laboratory setup, new individuals with higher p(D) are introduced each generation, potentially shifting allele frequencies despite random mating and no selection. Choice B correctly identifies ongoing gene flow from an external stock as the disrupting factor, violating the no-migration assumption. Choice A is incorrect because large population size actually supports equilibrium by minimizing drift, misconstruing size as a disruptor. A transferable check for Hardy-Weinberg assumptions is to assess external influences like migration by comparing allele frequencies before and after potential influx events. Consistent shifts aligned with source populations indicate gene flow disrupting equilibrium.

This question tests predictions under Hardy-Weinberg equilibrium when assumptions hold. The Hardy-Weinberg principle states that in a large, randomly mating population with no selection, mutation, or migration, allele frequencies remain constant, and genotypes match p², 2pq, q². In this deer population, current genotypes match expectations, suggesting equilibrium. Choice A correctly predicts stable allele frequencies of p=0.7 and q=0.3 in the next generation if assumptions continue. Choice B is incorrect because heterozygotes persist via random mating, not disappear due to segregation, misconstruing meiotic effects. A transferable check for Hardy-Weinberg assumptions is to verify if observed genotypes fit expected ratios using allele frequencies. Stability over generations confirms equilibrium conditions.