Activities Quiz

Chapter 23: The Evolution of Populations

Activities Quiz

1 .

Click on the diagram to start the animation. What process is illustrated by this animation? (Activity: Causes of Evolutionary Change)

natural selection

nonrandom mating

mutation

stabilizing selection

gene flow

2 .

Click on the diagram to start the animation. What process is illustrated by this animation? (Activity: Causes of Evolutionary Change)

natural selection

nonrandom mating

mutation

migration

gene flow

3 .

Generation-to-generation change in the allele frequencies in a population is _____. (Activity: Causes of Evolutionary Change)

microevolution

genetic drift

natural selection

mutation

macroevolution

4 .

Which of these individuals is a homozygous genotype? (Activity: Genetic Variation from Sexual Recombination)

AA

Aa

Gg

AG

aG

5 .

All the genes in a population are that population's _____. (Activity: Genetic Variation from Sexual Recombination)

gene pool

fitness

genotype

Hardy-Weinberg

phenotype

6 .

Genetic drift is a process based on _____. (Activity: Genetic Variation from Sexual Recombination)

differential reproductive success correlated to the relationship between a phenotype and the environment

immigration

mutation

the role of chance

emigration

7 .

A mutation occurs when _____. (Activity: Genetic Variation from Sexual Recombination)

individuals leave a population

individuals enter a population

some individuals leave more offspring than other individuals

there is a change in the DNA sequence of a gene

population sizes are small

8 .

Every few years a giant axe chops off the head of every person who is over 6 feet tall. How will this affect the human population? (Activity: Genetic Variation from Sexual Recombination)

Gene flow will increase.

Alleles that promote "tallness" will decrease in frequency.

Genetic drift will play less of a role in the evolution of humans.

It will increase in number since shorter people use fewer resources than taller people.

The mutation rate will increase.

9 .

Modern travel along with migration reduces the probability of _____ having an effect on the evolution of humans. (Activity: Genetic Variation from Sexual Recombination)

gene flow

mutation

disease

genetic drift

natural selection

10 .

The ease with which humans travel across the globe is likely to increase _____. (Activity: Genetic Variation from Sexual Recombination)

natural selection

gene flow

mutation

genetic drift

all of these

11 .

Homologous pairs of chromosomes are lined up independently of other such pairs during _____. (Activity: Genetic Variation from Sexual Recombination)

metaphase I

anaphase I

prophase II

metaphase II

telophase II

12 .

Crossing over, resulting in an increase in genetic variation, occurs between _____. (Activity: Genetic Variation from Sexual Recombination)

sex cells and somatic cells

sister chromatids of homologous chromosomes

nonsister chromatids of homologous chromosomes

sister chromatids of nonhomologous chromosomes

nonsister chromatids of nonhomologous chromosomes

13 .

In human gamete production there is an average of _____ crossover events per chromosome pair. (Activity: Genetic Variation from Sexual Recombination)

0–1

2–3

5–6

9–10

10+

14 .

Click on the diagram to start the animation. Which of these gametes contain one or more recombinant chromosomes? (Activity: Genetic Variation from Sexual Recombination)

A, B, and C

C, D, E, F, and G

B, C, and G

B, C, F, and G

B, C, D, and G

15 .

Click on the diagram to start the animation. This animation illustrates _____ as it occurs during _____. (Activity: Genetic Variation from Sexual Recombination)

centrosome separation ... anaphase II

cytokinesis ... telophase I

crossing over ... prophase I

random fertilization ... prophase I

karyokinesis ... prophase II