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UWEC Bio 222 Exam 1 Questions and Answers New (2025/2026) Solved 100% Correct $7.99   Add to cart

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UWEC Bio 222 Exam 1 Questions and Answers New (2025/2026) Solved 100% Correct

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  • UWEC Bio 222
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  • UWEC Bio 222

Requirements for Hardy-Weinberg equilibrium - ️️1. No mutations 2. Large population so random chance does not cause allele frequency changes 3. No migration in or out of the population 4. Random mating happens 5. No phenotypic advantage is present Analogous structures - ️️Parts that ha...

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  • October 16, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • UWEC Bio 222
  • UWEC Bio 222
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PatrickKaylian
UWEC Bio 222 Exam 1
Requirements for Hardy-Weinberg equilibrium - ✔️✔️1. No mutations
2. Large population so random chance does not cause allele frequency changes
3. No migration in or out of the population
4. Random mating happens
5. No phenotypic advantage is present


Analogous structures - ✔️✔️Parts that have the same function, but developed from
different lineages

Genetic bottleneck - ✔️✔️Losing genetic or phenotypic diversity due to genetic drift

Gene flow - ✔️✔️Movement of new alleles from one population to another


What happens if a population is not in HW equilibrium - ✔️✔️Evolution

Directional selection - ✔️✔️Change of the phenotypic frequency direction over time

Stabilizing selection - ✔️✔️Reduction of phenotypic frequency over time (a happy
average is found)

Disruptive equilibrium - ✔️✔️Selection pushes the population in two directions at once

Balancing selection - ✔️✔️Maintaining genetic diversity through balanced
polymorphism

Homologous structures - ✔️✔️Characteristics from a common ancestor, share a
developmental pathway

Genetic drift - ✔️✔️Random chance of gene variation in a population

What are the prezygotic isolation mechanisms? - ✔️✔️1. Habitat isolation
2. Temporal isolation
3. Behavioral isolation
4. Grasping appendages
5. Floral structure
6. Gamete recognition

, What are the postzygotic isolation mechanisms? - ✔️✔️1. Hybrid inviable (fetus does
not develop correctly)
2. Hybrid sterility
3. Hybrid breakdown

Allopatric speciation - ✔️✔️Development of new species due to geographic separation

Vicariance - ✔️✔️Barrier that prevents migration

Adaptive radiation - ✔️✔️Species separates to different environments

Sympatric speciation - ✔️✔️Development of new species within a population (hard to
do)

Disruptive speciation - ✔️✔️Natural selection drives a population in two ways at once

Polyploidy - ✔️✔️Duplication of genomes

Gradualism - ✔️✔️Species from a common ancestor diverged overtime and acquire
unique morphologies

Punctuated equilibrium - ✔️✔️Species changes most as it buds from parent and
changes very little more

Convergent evolution - ✔️✔️Two species from different lineages become anatomically
similar when in similar environments

Horizontal gene transfer - ✔️✔️Genes from one species are introduced to another

How are species named? - ✔️✔️Genus + specific epithet

Proximate cause - ✔️✔️Answers how, short-term, neuro/hormonal/developmental,
genetic physiological

Ultimate cause - ✔️✔️Answers why, long-term, fitness benefits vs. costs, evolutionary
history

Niche - ✔️✔️Set of resources and conditions a species needs to survive and reproduce

Stress - ✔️✔️Reduced fitness due suboptimal resources and conditions

Resources - ✔️✔️Commodities that can be depleted

Conditions - ✔️✔️Things that affect vital rates

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