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Chapter 13 Mastering Biology Exam Questions and Answers
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Chapter 13 Mastering Biology Exam Questions and Answers
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Chapter 13 Mastering Biology ExamQuestions and Answers
The evolution of populations due to chance is ________________________ - Answer -
genetic drift describes the evolution of a population due to chance
If color is an inherited trait in beetles, and birds are more likely to eat brown beetles than
green beetles, _______________________ - Answer -the frequency of the green allele
will increase
In a population with brown and green alleles for color, genetic drift ________________ -
Answer -has more effect on the evolution of a small population.
Color is an inherited trait in beetles. If brown beetles move into a population from a
nearby island, which of the following statements is correct? - Answer -Gene flow causes
the frequency of the brown allele to increase
Remember that color is an inherited trait in beetles. Which of the following is an
example of natural selection? - Answer -Green beetles leave more offspring than brown
beetles because they are better at finding food
Which of these individuals is a homozygous genotype? - Answer -AA
All the genes in a population are that population's ___________ - Answer -gene pool
Genetic drift is a process based on ______________ - Answer -the role of chance
A mutation occurs when _________________ - Answer -there is a change in the DNA
sequence of a gene
Suppose that every few years, all people over 6 feet tall do not have any children. How
will this affect the human population. - Answer -Alleles that promote "tallness" will
decrease in frequency
Modern travel along with migration reduces the probability of _____________ - Answer
-genetic drift
The ease with which humans travel across the globe is likely to increase ____________
- Answer -gene flow
, Homologous pairs of chromosomes are lined up independently of other such pairs
during _______________ - Answer -metaphase 1
Crossing over, resulting in an increase in genetic variation, occurs between
_______________ - Answer -nonsister chromatids of homologous chromosomes
In human gamete production there is an average of ________________ crossover
events per chromosome pairs - Answer -2-3
Which of these gametes contain one or more recombinant chromosomes? - Answer -
B<C,F and G
Which of the following is the most recent example of an evolutionary change in
populations? - Answer -The development of pesticide- resistant insects
Imagine that anew population of humans is established on a previously uninhabited
planet from ten randomly selected people in your biology class. Over thousands of
years, the descendants of those ten people reproduce and prosper, but they do not
reflect well he diversity of humans on Earth. This reduction in genetic diversity in the
establishment of the population is an example of ___________ - Answer -the founder
effect
Which of he following examples of natural selection has occurred over the course of our
lifetime? - Answer -The evolution of antibiotic resistant bacteria
The population of American bison used to number in the millions. hunting and other
problems greatly decreased the number of bison to about 1,000. today, the numbers are
recovering to estimates of more than 200,000 bison. This crash in the population of
bison and recent recovery is an example of ___________ - Answer -the bottleneck
effect
Which of the following is a true statement? - Answer -Species with nucleotide
sequences that much closely share a recent common ancestor
In recessive lethal diseases such as Tay-Sachs disease, carriers have one copy of the
normal allele and one copy of the allele for the disease. Carriers are represented in the
Hardy- Weinberg formula by _____ - Answer -2pq
A process in which organisms with certain inherited characteristics are more likely to
survive and reproduce than individuals with other characteristics is called
______________ - Answer -natural selection
the common house mouse species, Mus musculus, has the following taxonomics,
classification: Mus, Murinda, Rodentia, Mammalia, Chordata, Animalia, Eukarya. Which
part of the name is the Family? - Answer -Muridae
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