Genetic Equilibrium and Natural Selection

Genetic Equilibrium and Natural Selection

Assessment

Interactive Video

Biology

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial discusses evolution as a genetic change, focusing on how natural selection affects allele frequencies in populations. It explains the types of natural selection: directional, stabilizing, and disruptive. The concept of genetic drift and the founder effect are introduced as random events affecting allele frequencies. The Hardy-Weinberg principle is explained, outlining conditions for genetic equilibrium where evolution does not occur.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary mechanism by which evolution occurs in populations?

Migration

Mutation

Natural selection

Genetic drift

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a population, what happens to alleles that provide a survival advantage?

They remain constant

They decrease in frequency

They increase in frequency

They disappear

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of natural selection favors individuals at one extreme of a trait distribution?

Balancing selection

Disruptive selection

Stabilizing selection

Directional selection

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of stabilizing selection on a population?

Increased variation

Decreased variation

Creation of new species

Shift in trait distribution

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What occurs during disruptive selection?

A new phenotype emerges

The middle phenotype is favored

All phenotypes are equally favored

Extreme phenotypes are favored

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is genetic drift?

A change in allele frequency due to migration

A change in allele frequency due to mutation

A random change in allele frequency

A change in allele frequency due to natural selection

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the founder effect?

A population experiencing a bottleneck

A mutation spreading through a population

A small group starting a new population

A large population colonizing a new area

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