Exam 1 Review

Exam 1 Review

Assessment

Flashcard

Biology

University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is heterozygote advantage?

Back

Heterozygote advantage refers to a situation where individuals with two different alleles for a particular gene (heterozygotes) have a higher fitness than those with two identical alleles (homozygotes). This phenomenon helps maintain genetic variation in a population.

2.

FLASHCARD QUESTION

Front

What type of selection selects against both extremes in a population?

Back

Stabilizing selection is a type of natural selection that favors intermediate variants and acts against extreme phenotypes, thereby maintaining the status quo of a population.

3.

FLASHCARD QUESTION

Front

What is allopatric speciation?

Back

Allopatric speciation occurs when a population is divided by a geographical barrier, leading to the evolution of distinct species due to the lack of gene flow between the separated groups.

4.

FLASHCARD QUESTION

Front

What happens to populations when gene flow increases?

Back

When gene flow between two populations increases, they become genetically similar, as alleles are exchanged between the populations, reducing genetic divergence.

5.

FLASHCARD QUESTION

Front

What are the possible causes for a rare allele to increase in frequency?

Back

Natural selection, a population bottleneck, and the founder effect can all lead to an increase in the frequency of a rare allele within a population.

6.

FLASHCARD QUESTION

Front

Define stabilizing selection.

Back

Stabilizing selection is a form of natural selection that favors average phenotypes and reduces variation by selecting against extreme traits.

7.

FLASHCARD QUESTION

Front

What is the founder effect?

Back

The founder effect occurs when a small group of individuals establishes a new population, leading to reduced genetic diversity and potentially different allele frequencies compared to the original population.

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