Question 1

Crossing over​

Accepted Answer

A)   ​increases variability in gametes.
B)   ​happens only once per homologue pair.
C)   ​occurs between sister chromatids.
D)   ​prevents genetic recombination.
E)   ​is followed immediately by separation of the chromatids.

Question 2

Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?​

Accepted Answer

A)   ​mother
B)   ​parallel
C)   ​sister
D)   ​homogenous
E)   haploid​

Question 3

Which of the following occur in telophase I of meiosis?​

Accepted Answer

A)   ​nuclear envelope formation
B)   ​pairing of homologues
C)   ​formation of a bipolar spindle
D)   ​crossing over
E)   condensation of chromosomes​

Question 4

Discuss the unique reproductive capacity of the bdelloid rotifer.

Accepted Answer

A newly discovered ability may help to e...

Question 5

The figure above represents

Accepted Answer

A)   ​individual genes from an asexual worm.
B)   ​maternal chromosomes that are identical.
C)   ​paternal chromosomes that are identical.
D)   ​homologous chromosomes.
E)   nonhomologous chromosomes.​

Question 6

What would happen if sister chromatids did not break apart during anaphase of mitosis?

Accepted Answer

Each duplicated chromosome wou...

Question 7

Figure 12.7
 
-The accompanying illustration shows one possible outcome of the random alignment of homologous chromosomes at metaphase I. How many OTHER possible arrangements exist?

Accepted Answer

A)   ​none
B)   ​one
C)   ​two
D)   seven
E)   ​eight

Question 8

Sexual reproduction

Accepted Answer

A)   ​leads to uniform characteristics within a population.
B)   ​results in new combinations of genetic traits.
C)   ​creates genetic clones.
D)   ​requires less tissue differentiation than asexual reproduction.
E)   produces genetic clones and requires less tissue differentiation than asexual reproduction.​

Question 9

Match the term to the correct description.​
-Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.

Accepted Answer

A)  ​prophase II
B)  ​metaphase I
C)  ​telophase II
D)  ​meoisis II

Question 10

During prophase II, ____.

Accepted Answer

A)   ​a new spindle forms
B)   ​crossing over occurs
C)   ​chromosomes are single-stranded
D)   ​the cell is diploid
E)   the nuclear envelope re-forms​

Question 11

Chromosome segregation in anaphase I is consistent with which statement?

Accepted Answer

A)   ​The position where crossing over occurs is random.
B)   ​The pole that any one chromosome moves toward is completely independent of the movement of the other 45 chromosomes in human cells.
C)   ​Either partner of a homologous pair of chromosomes may end up at either spindle pole.
D)   ​The sperm that fertilizes the egg is selected at random.
E)   ​The number of crossing over events is random.

Question 12

Which of the following is an advantage of sexual reproduction?​

Accepted Answer

A)   ​It prevents adaptation in a changing environment.
B)   ​It eliminates the possibility of harmful traits being passed on.
C)   ​It passes on half of a parent's genome.
D)   ​It reduces genetic variation, which may be useful in the future.
E)   ​It yields offspring with novel combinations of traits.

Question 13

A diploid organism has ten homologous chromosome pairs. Disregarding crossing over, how many genetically different gametes are possible?

Accepted Answer

Each gamete will inherit one o...

Question 14

Meiosis typically results in the production of

Accepted Answer

A)   ​two diploid cells.
B)   ​four diploid cells.
C)   ​four haploid cells.
D)   ​two haploid cells.
E)   ​one triploid cell.

Question 15

In comparing mitosis and meiosis, which statement is true?

Accepted Answer

A)   ​Meiosis I is more like mitosis than is meiosis II.
B)   ​Both processes result in four cells.
C)   ​Pairing of homologues occurs in both.
D)   ​Chromatids are present only in mitosis.
E)   Meiosis II resembles mitosis.​

Question 16

Fertilization of plant gametes produces a

Accepted Answer

A)   ​zygote.
B)   ​gametophyte.
C)   ​spore.
D)   ​meiospore.
E)   multicellular haploid plant.​

Question 17

At __________, the fusion of two gametes produces a(n) __________.

Accepted Answer

fertilizat...

Question 18

Crossing over​

Accepted Answer

A)   occurs during mitosis.
B)   ​involves centrioles.
C)   ​involves breakages and exchanges between sister chromatids.
D)   ​results in new combinations of alleles being channeled into the daughter cells.
E)   only occurs in animal cells.​

Question 19

If a diploid organism has a genome consisting of four pairs of homologous chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes in gametes (disregarding crossing over) .

Accepted Answer

A)   ​4
B)   ​8
C)   ​12
D)   ​16
E)   ​32

Question 20

Which statement correctly describes human chromosomes?

Accepted Answer

A)   ​The haploid number is 22
B)   ​Human gametes end up with two of each type of 23 chromosomes.
C)   ​There are 42 pairs of chromosomes.
D)   ​The diploid number is 46.
E)   ​Human gametes end up with one of each type of 22 chromosomes.

Exam 12: Meiosis and Sexual Reproduction

What would happen if sister chromatids did not break apart during anaphase of mitosis?

Correct AnswerverifiedEach duplicated chromosome wou...View AnswerShow Answer

Crossing over​

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Which of the following is an advantage of sexual reproduction?​

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At __________, the fusion of two gametes produces a(n) __________.

Correct Answerverifiedfertilizat...View AnswerShow Answer

Match the term to the correct description.​ -Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.

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In comparing mitosis and meiosis, which statement is true?

Correct AnswerverifiedShow Answer

Fertilization of plant gametes produces a

Correct AnswerverifiedShow Answer

Crossing over​

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Figure 12.7 -The accompanying illustration shows one possible outcome of the random alignment of homologous chromosomes at metaphase I. How many OTHER possible arrangements exist?

Correct AnswerverifiedShow Answer

Which of the following occur in telophase I of meiosis?​

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Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?​

Correct AnswerverifiedShow Answer

A diploid organism has ten homologous chromosome pairs. Disregarding crossing over, how many genetically different gametes are possible?

Correct AnswerverifiedEach gamete will inherit one o...View AnswerShow Answer

The figure above represents

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Which statement correctly describes human chromosomes?

Correct AnswerverifiedShow Answer

Meiosis typically results in the production of

Correct AnswerverifiedShow Answer

If a diploid organism has a genome consisting of four pairs of homologous chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes in gametes (disregarding crossing over) .

Correct AnswerverifiedShow Answer

Sexual reproduction

Correct AnswerverifiedShow Answer

Discuss the unique reproductive capacity of the bdelloid rotifer.

Correct AnswerverifiedA newly discovered ability may help to e...View AnswerShow Answer

Chromosome segregation in anaphase I is consistent with which statement?

Correct AnswerverifiedShow Answer

During prophase II, ____.

Correct AnswerverifiedShow Answer

Correct Answer
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Each duplicated chromosome wou...
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Crossing over

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Which of the following is an advantage of sexual reproduction?

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At , the fusion of two gametes produces a(n) .

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fertilizat...
View Answer

Match the term to the correct description. -Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.

Correct Answer
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Correct Answer
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Correct Answer
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Crossing over

Correct Answer
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Correct Answer
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Which of the following occur in telophase I of meiosis?

Correct Answer
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Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?

Correct Answer
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Correct Answer
verified
Each gamete will inherit one o...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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A newly discovered ability may help to e...
View Answer

Correct Answer
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Correct Answer
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