Question 1

The two homologous chromosomes pair along their length early in the first nuclear division.During this physical joining genetic exchange occurs between them in a process called _________.

Accepted Answer

A)  fusion
B)  mitosis
C)  meiosis
D)  recombinationE) A) and B)
F) A) and C)

Question 2

Which of the following produces identical cells?

Accepted Answer

A)  meiosis
B)  mitosis
C)  gamete formation
D)  syngamy
E)  fertilizationF) A) and D)
G) B) and C)

Question 3

Evidence of crossing over can often be seen under the light microscope as a structure known as a ________.

Accepted Answer

A)  chromosome
B)  centromere
C)  chiasma
D)  histoneE) A) and D)
F) B) and D)

Question 4

What evidence supports the observation that sister centromeres behave as a unit during meiosis I?

Accepted Answer

A)  Data from electron microscopy studies suggests that the centromere/kinetochore complex of sister chromatids is compacted.The kinetochores then capture microtubules in a way that allows the kinetochores of sister chromatids to function as a single unit.
B)  Data from electron microscopy studies suggests that the centromere/kinetochore complex of homologous chromosomes is diffuse.The kinetochores then release microtubules in a way that allows the kinetochores of homologous chromosomes to function as a single unit.
C)  Data from electron microscopy studies suggests that the chromosomes are compacted.The chromosomes then capture microtubules in a way that allows the them to function as a single unit.D) A) and C)
E) All of the above

Question 5

Livestock owners and breeders have most likely maximized their abilities to greatly improve size and speed of the animals that they raise.This is a consequence of

Accepted Answer

A)  too many crossing over events in previous livestock generations.
B)  not enough crossing over events in previous livestock generations.
C)  existing genetic combinations have been nearly exhausted as well as the limited amount of genetic variability that existed to begin with.
D)  using artificial insemination instead of allowing animals to breed on their own.E) A) and B)
F) All of the above

Question 6

A process in which pairs of homologous complex chromosomes line up side by side.

Accepted Answer

A)  chiasma
B)  homologue
C)  kinetochore
D)  synapsis
E)  synaptonemalF) B) and C)
G) A) and B)

Question 7

A lattice of protein holds two replicated chromosomes in precise register with one another.

Accepted Answer

A)  chiasma
B)  homologue
C)  kinetochore
D)  synapsis
E)  synaptonemalF) D) and E)
G) A) and B)

Question 8

Sexual reproduction is significant in increasing genetic ______.

Accepted Answer

A)  similarity
B)  diversity
C)  robustness
D)  connectionsE) C) and D)
F) None of the above

Question 9

Chromosomes exchange genetic information by

Accepted Answer

A)  fertilization.
B)  mitosis.
C)  syngamy.
D)  DNA replication.
E)  crossing over.F) A) and D)
G) C) and D)

Question 10

You are working with a yeast strain that carries a Rec8 mutation.Based on what you know about Rec8,you most likely would expect to observe

Accepted Answer

A)  meiosis I segregation defects.
B)  meiosis II segregation defects.
C)  failure of sister chromatid separation during meiosis I.
D)  failure of sister chromatid separation during meiosis II.E) A) and D)
F) B) and C)

Question 11

Organisms that undertake sexual reproduction alternate between ______ and fertilization.

Accepted Answer

A)  mitosis
B)  meiosis
C)  spermatogenesis
D)  growthE) All of the above
F) A) and B)

Question 12

The majority of the meiosis I is spent in prophase I and metaphase I.After metaphase I is completed,anaphase I and telophase I quickly proceed,thus ending meiosis I.What immediately follows meiosis I?

Accepted Answer

A)  DNA synthesis
B)  prophase II
C)  metaphase II
D)  developing of a synapsis
E)  crossing over of the homologuesF) A) and D)
G) A) and E)

Question 13

In 95% of cases of Down's syndrome,there is an entire extra chromosome 21 in every cell.This aneuploid condition is the result of

Accepted Answer

A)  improper crossing over.
B)  independent assortment.
C)  nondisjunction.
D)  achiasmate segregation.E) A) and B)
F) A) and C)

Question 14

The point of connection between the two sister chromatids before anaphase of mitosis separates them is called the

Accepted Answer

A)  homologue.
B)  kinetochore.
C)  centromere.
D)  microtubule complex.
E)  synapsis.F) B) and D)
G) D) and E)

Question 15

The zygote has

Accepted Answer

A)  one copy of each chromosome.
B)  one full haploid complement of chromosomes.
C)  chromosomes identical to those of a sperm cell.
D)  chromosomes identical to those of an egg cell.
E)  two copies of each chromosomE.F) All of the above
G) C) and D)

Question 16

Which of the following is likely to occur if you were to prevent cyclin B from associating with its cyclin-dependent kinase near the end of meiosis I?

Accepted Answer

A)  failure to maintain sister chromatid cohesion at the centromere
B)  failure to form initiation complexes necessary for DNA replication to proceed
C)  suppression of DNA replication
D)  premature DNA replicationE) All of the above
F) B) and C)

Question 17

The reduction division that separates two haploid complements from each other is called

Accepted Answer

A)  mitosis.
B)  meiosis.
C)  syngamy.
D)  haploid division.
E)  binary fission.F) B) and E)
G) A) and B)

Question 18

If you could examine closely a recombination nodule, you may find

Accepted Answer

A)   enzymes necessary to break and rejoin homologous chromosomes.
B)   crossing over between sister chromatids.
C)   sites of DNA replication.
D)   cyclin B.E) All of the above
F) B) and D)

Exam 11: Sexual Reproduction and Meiosis

Chromosomes exchange genetic information by

Correct Answer
verified

The reduction division that separates two haploid complements from each other is called

Correct Answer
verified

The two homologous chromosomes pair along their length early in the first nuclear division.During this physical joining genetic exchange occurs between them in a process called _________.

Correct Answer
verified

Organisms that undertake sexual reproduction alternate between ______ and fertilization.

Correct Answer
verified

The majority of the meiosis I is spent in prophase I and metaphase I.After metaphase I is completed,anaphase I and telophase I quickly proceed,thus ending meiosis I.What immediately follows meiosis I?

Correct Answer
verified

You are working with a yeast strain that carries a Rec8 mutation.Based on what you know about Rec8,you most likely would expect to observe

Correct Answer
verified

Which of the following produces identical cells?

Correct Answer
verified

A process in which pairs of homologous complex chromosomes line up side by side.

Correct Answer
verified

Evidence of crossing over can often be seen under the light microscope as a structure known as a ________.

Correct Answer
verified

If you could examine closely a recombination nodule, you may find

Correct Answer
verified

What evidence supports the observation that sister centromeres behave as a unit during meiosis I?

Correct Answer
verified

In 95% of cases of Down's syndrome,there is an entire extra chromosome 21 in every cell.This aneuploid condition is the result of

Correct Answer
verified

Sexual reproduction is significant in increasing genetic ______.

Correct Answer
verified

The point of connection between the two sister chromatids before anaphase of mitosis separates them is called the

Correct Answer
verified

Livestock owners and breeders have most likely maximized their abilities to greatly improve size and speed of the animals that they raise.This is a consequence of

Correct Answer
verified

The zygote has

Correct Answer
verified

Which of the following is likely to occur if you were to prevent cyclin B from associating with its cyclin-dependent kinase near the end of meiosis I?

Correct Answer
verified

A lattice of protein holds two replicated chromosomes in precise register with one another.

Correct Answer
verified

Exam 11: Sexual Reproduction and Meiosis

Chromosomes exchange genetic information by

Correct AnswerverifiedShow Answer

The reduction division that separates two haploid complements from each other is called

Correct AnswerverifiedShow Answer

The two homologous chromosomes pair along their length early in the first nuclear division.During this physical joining genetic exchange occurs between them in a process called _________.

Correct AnswerverifiedShow Answer

Organisms that undertake sexual reproduction alternate between ______ and fertilization.

Correct AnswerverifiedShow Answer

The majority of the meiosis I is spent in prophase I and metaphase I.After metaphase I is completed,anaphase I and telophase I quickly proceed,thus ending meiosis I.What immediately follows meiosis I?

Correct AnswerverifiedShow Answer

You are working with a yeast strain that carries a Rec8 mutation.Based on what you know about Rec8,you most likely would expect to observe

Correct AnswerverifiedShow Answer

Which of the following produces identical cells?

Correct AnswerverifiedShow Answer

A process in which pairs of homologous complex chromosomes line up side by side.

Correct AnswerverifiedShow Answer

Evidence of crossing over can often be seen under the light microscope as a structure known as a ________.

Correct AnswerverifiedShow Answer

If you could examine closely a recombination nodule, you may find

Correct AnswerverifiedShow Answer

What evidence supports the observation that sister centromeres behave as a unit during meiosis I?

Correct AnswerverifiedShow Answer

In 95% of cases of Down's syndrome,there is an entire extra chromosome 21 in every cell.This aneuploid condition is the result of

Correct AnswerverifiedShow Answer

Sexual reproduction is significant in increasing genetic ______.

Correct AnswerverifiedShow Answer

The point of connection between the two sister chromatids before anaphase of mitosis separates them is called the

Correct AnswerverifiedShow Answer

Livestock owners and breeders have most likely maximized their abilities to greatly improve size and speed of the animals that they raise.This is a consequence of

Correct AnswerverifiedShow Answer

The zygote has

Correct AnswerverifiedShow Answer

Which of the following is likely to occur if you were to prevent cyclin B from associating with its cyclin-dependent kinase near the end of meiosis I?

Correct AnswerverifiedShow Answer

A lattice of protein holds two replicated chromosomes in precise register with one another.

Correct AnswerverifiedShow Answer

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