A population of snakes that eat small rodents enters a new habitat. In the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. What will most likely be the effect on the genetic variation of the snake population? Genetic variation will increase because of a selective pressure. Genetic variation will increase because of a new habitat and food source. Genetic variation will decrease because of a selective pressure. Genetic variation will decrease because of a new habitat and food source.
Gene Flow
Gene flow, also known as gene migration, is the introduction of genetic material from a particular population to another population of the same species through interbreeding. For example, a bee facilitates its reproductive process by carrying pollen from one flower to another. The flow alters the composition of the gene pool of the receiving population. It introduces new alleles within the population and helps increase variability. This exchange of genetic material occurs through reproduction and brings about new combinations of traits into the population. Where human beings are concerned, actual migration of populations, whether voluntary or forced, brings about gene flow.
Population Biology
Population biology is the study of patterns in organism populations, specifically the growth and management of population size, population genetics, the evolution of life history, species interactions, and demography.
Speciation
The process of speciation involves the formation of new species during evolution. The new species evolve in such a way that both new and old species are not able to interbreed. Thus, speciation occurs when few members of one species get separated from the main species due to geographical, mechanical, or reproductive isolation. These separated members develop new traits that make them different from the main species. In other words, speciation could be defined as the absence of gene flow between two populations that become new species.
Allele Fixation
A gene is a unit of heredity and contains both physical and functional information that shapes an individual. Genes are made up of DNA (deoxyribonucleic acid), which carry genetic information from one generation to another, from one set of parents to their offspring, and so on. Every cell in a human body, or any living organism, has the same DNA, which implies that every cell in an individual’s body has all the information it needs to build and sustain the body!
![**Title: Impact of New Habitats on Genetic Variation in Snake Populations**
**Introduction:**
When a population of snakes that feed on small rodents enters a new habitat, it experiences changes in environmental conditions and resources. Understanding these changes can shed light on the evolutionary processes at play and the resultant genetic variation within the snake population.
**Question:**
A population of snakes that eat small rodents enters a new habitat. In the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. What will *most likely* be the effect on the genetic variation of the snake population?
**Answer Choices:**
1. Genetic variation will increase because of a selective pressure.
2. Genetic variation will increase because of a new habitat and food source.
3. Genetic variation will decrease because of a selective pressure.
4. Genetic variation will decrease because of a new habitat and food source.
**Discussion:**
To determine the correct answer, it's important to understand the concepts of selective pressure and genetic variation in evolutionary biology. Selective pressures are environmental factors that influence the survival and reproductive success of organisms, driving natural selection. Genetic variation, on the other hand, is the diversity of genetic traits within a population, allowing adaptation and evolution over time.
In the context of the snake population entering a new habitat:
- The abundance of rodent prey and limited natural predators suggest an environment with reduced selective pressure against the snakes.
- This new habitat and food source will offer different challenges and opportunities compared to their original habitat, potentially fostering diversity among the snake population.
**Graph/Diagram Explanation (if applicable):**
This question does not include a graph or diagram, focusing instead on a conceptual understanding of evolutionary principles.
**Conclusion:**
Given these considerations, the answer is:
- Genetic variation will increase because of a new habitat and food source.
This scenario illustrates how environmental changes can impact genetic diversity within a population, ultimately influencing evolutionary trajectories.
**Notes for Educators:**
This topic can be used to introduce students to basic evolutionary concepts and the factors that influence genetic diversity. Discussions can be expanded to include case studies and real-world examples of species adapting to new environments.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8013d441-5946-4d9d-b85b-992de95a8487%2Fa954b3f7-b256-425d-a7e2-31f5fbc9acd5%2F0oo8249_processed.png&w=3840&q=75)
![**Scenario: Bird Populations on an Island and Mainland**
A population of birds lives on a small island. Another population of the same species lives on the mainland. The distance between the island and the mainland is too great for birds to fly back and forth. Recently, a series of sandbars and tiny islands have formed between the island and the mainland.
**Question:**
What is the most likely effect of this?
1. ○ an increase in mutations in both bird populations
2. ○ an increase in gene flow between the bird populations
3. ○ an increase in genetic drift between the bird populations
4. ○ an increase in mutations in the island population
**Diagram/Graph Explanation:**
This scenario does not include any diagrams or graphs. The question focuses on predicting the biological impact of newly formed sandbars and tiny islands between previously isolated bird populations. The answer choices evaluate potential genetic consequences such as mutations, gene flow, and genetic drift.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8013d441-5946-4d9d-b85b-992de95a8487%2Fa954b3f7-b256-425d-a7e2-31f5fbc9acd5%2F3f2ixhf_processed.png&w=3840&q=75)
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