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.

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Chapter18: Genetics Of Behavior
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**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.
Transcribed Image Text:**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.
**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.
Transcribed Image Text:**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.
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