BIO 100 EXAM 2 EXAM REVIEW QUESTIONS
AND CORRECT ANSWERS
◉ Parents are naturally selected to _______ the difference between the
benefits and the costs, and parental care ________exist when the
benefits are substantially greater than the costs.
a. minimize, will
b. maximize, will
c. minimize, will not
d. maximize, will not
Answer: b. maximize, will
◉ Which of the following are costs of parental investment?
a. Time
b. Energy
c. Resources
d. Risk
e. Only a few offspring
f. All of the above
Answer: f. All of the above
◉ A reproductive mistake is ______.
,a. choosing a mate who will produce young that do not survive
b. choosing the best partner
c. forgetting to pick up your son from school
d. maximizing costs versus benefits of mating
Answer: a. choosing a mate who will produce young that do not
survive
◉ Females tend to be in charge of mating because _______.
a. females have more to lose if they choose poorly
b. males are more polite
c. males have more to lose by choosing poorly
d. females are naturally pushy
Answer: a. females have more to lose if they choose poorly
◉ Alternate forms of a gene are called _______.
a. alleles
b. chromosomes
c. gametes
d. a phenotype
Answer: a. alleles
,◉ Describing a person as having hemophilia is to indicate his or her
______.
a. genotype
b. phenotype
c. genetic code
d. number of chromosomes
Answer: b. phenotype
◉ Why do your chromosomes come in pairs?
a. Because DNA is double-stranded, one member of each
chromosome pair carries a strand that is complementary to the
strand carried by the other chromosome.
b. Because cell division via mitosis cannot take place without paired
chromosomes.
c. Because one member of each pair came from my mother and the
other from my father.
d. Because so much genetic information must be carried, all
organisms, including humans, need twice as much DNA in order for
it all to fit.
Answer: c. Because one member of each pair came from my mother
and the other from my father.
◉ How did Mendel get the peas to cross-fertilize?
a. He placed them close together in the garden.
, b. He kept them apart and pollinated them by hand.
c. He allowed them to self-fertilize.
d. He did nothing at all.
Answer: b. He kept them apart and pollinated them by hand.
◉ The observable traits expressed by an organism are described as
its ________.
a. phenotype
b. genotype
c. alleles
d. zygote
Answer: a. phenotype
◉ Half of the gametes produced by an organism with the genotype
Aa will receive the A allele, while half will receive the a allele. This is
a demonstration of ______.
a. independent assortment
b. mutation
c. random fertilization
d. segregation
Answer: d. segregation
AND CORRECT ANSWERS
◉ Parents are naturally selected to _______ the difference between the
benefits and the costs, and parental care ________exist when the
benefits are substantially greater than the costs.
a. minimize, will
b. maximize, will
c. minimize, will not
d. maximize, will not
Answer: b. maximize, will
◉ Which of the following are costs of parental investment?
a. Time
b. Energy
c. Resources
d. Risk
e. Only a few offspring
f. All of the above
Answer: f. All of the above
◉ A reproductive mistake is ______.
,a. choosing a mate who will produce young that do not survive
b. choosing the best partner
c. forgetting to pick up your son from school
d. maximizing costs versus benefits of mating
Answer: a. choosing a mate who will produce young that do not
survive
◉ Females tend to be in charge of mating because _______.
a. females have more to lose if they choose poorly
b. males are more polite
c. males have more to lose by choosing poorly
d. females are naturally pushy
Answer: a. females have more to lose if they choose poorly
◉ Alternate forms of a gene are called _______.
a. alleles
b. chromosomes
c. gametes
d. a phenotype
Answer: a. alleles
,◉ Describing a person as having hemophilia is to indicate his or her
______.
a. genotype
b. phenotype
c. genetic code
d. number of chromosomes
Answer: b. phenotype
◉ Why do your chromosomes come in pairs?
a. Because DNA is double-stranded, one member of each
chromosome pair carries a strand that is complementary to the
strand carried by the other chromosome.
b. Because cell division via mitosis cannot take place without paired
chromosomes.
c. Because one member of each pair came from my mother and the
other from my father.
d. Because so much genetic information must be carried, all
organisms, including humans, need twice as much DNA in order for
it all to fit.
Answer: c. Because one member of each pair came from my mother
and the other from my father.
◉ How did Mendel get the peas to cross-fertilize?
a. He placed them close together in the garden.
, b. He kept them apart and pollinated them by hand.
c. He allowed them to self-fertilize.
d. He did nothing at all.
Answer: b. He kept them apart and pollinated them by hand.
◉ The observable traits expressed by an organism are described as
its ________.
a. phenotype
b. genotype
c. alleles
d. zygote
Answer: a. phenotype
◉ Half of the gametes produced by an organism with the genotype
Aa will receive the A allele, while half will receive the a allele. This is
a demonstration of ______.
a. independent assortment
b. mutation
c. random fertilization
d. segregation
Answer: d. segregation
