Activities Quiz
1.

Click on the diagram to start the animation.

What process is illustrated by this animation? (Activity 23A)

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 23A)

natural selection
nonrandom mating
mutation
migration
gene flow


3.

Generation to generation change in the allele frequencies in a population is _____. (Activity 23A)

microevolution
genetic drift
natural selection
mutation
macroevolution


4.

Which of these individuals is a homozygous genotype? (Activity 23B)

AA
Aa
Gg
AG
aG


5.

All the genes in a population are that population's _____. (Activity 23B)

gene pool
fitness
genotype
Hardy-Weinberg
phenotype


6.

Genetic drift is a process based on _____. (Activity 23B)

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 23B)

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 23B)

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 23B)

gene flow
mutation
disease
genetic drift
natural selection


10.

The ease with which humans travel across the globe is likely to increase _____. (Activity 23B)

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 23B)

metaphase I
anaphase I
prophase II
metaphase II
telophase II


12.

Crossing over, resulting in an increase in genetic variation, occurs between _____. (Activity 23B)

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 23B)

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 23B)

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 23B)

centrosome separation ... anaphase II
cytokinesis ... telophase I
crossing over ... prophase I
random fertilization ... prophase I
karyokinesis ... prophase II



-------

2002 Pearson Education, Inc.,
publishing as Benjamin Cummings