Question 1

A change in the chromosome number resulting from nondisjunction is called euploidy.

Accepted Answer

A) True 
 B)False

Question 2

If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.

Accepted Answer

A)   4
B)   8
C)   12
D)   16
E)   24F) D) and E)
G) C) and E)

Question 3

Which statement is NOT true about homologues in meiosis I?

Accepted Answer

A)   Homologous chromosomes pair to form a tetrad.
B)   Homologous chromosomes separate and go to different daughter cells.
C)   Each homologue's centromere splits to form two chromosomes.
D)   Homologues exchange genetic material between non-sister chromatids.
E)   Homologues interact with the spindle as if they were one chromosome.F) A) and D)
G) B) and E) C

Question 4

What is the importance of crossing-over?

Accepted Answer

A)   It provides extra genetic material for the daughter cells.
B)   It increases the likelihood that daughter cells contain different genetic material.
C)   It produces the proteins that are associated with DNA in chromosomes.
D)   It increases chromosome condensation.
E)   It separates the homologous chromosomes.F) B) and D)
G) B) and E)

Question 5

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Accepted Answer

A) True 
 B)False

Question 6

It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. One main reason would be

Accepted Answer

A)   males provide more genes in sperm than females provide in eggs.
B)   crossing over occurs more often in the formation of sperm than in eggs.
C)   spermatogenesis in males results in four functional sperm while oogenesis in females results in only one egg and three structures that contain genetic information that is lost when they disintegrate.
D)   sperm that contain a recombination of genes are usually more successful in fertilizing an egg.E) A) and B)
F) A) and C)

Question 7

Which is NOT true about daughter cells of mitosis or meiosis?

Accepted Answer

A)   In meiosis, daughter cells are haploid.
B)   In meiosis, there are four daughter cells.
C)   In mitosis, there are two daughter cells.
D)   In mitosis, the daughter cells are genetically identical.
E)   In meiosis, the daughter cells are genetically identical.F) A) and D)
G) None of the above E

Question 8

Interkinesis is different from interphase in which way?

Accepted Answer

A)   Interkinesis occurs after a cell finishes a nuclear division.
B)   Interkinesis is the stage that precedes a prophase stage.
C)   Interphase involves DNA replication and interkinesis does not.
D)   Interkinesis can be variable in length.E) B) and C)
F) All of the above

Question 9

Where in the human male does spermatogenesis occur?

Accepted Answer

A)   ovaries
B)   prostate gland
C)   epididymus
D)   testesE) A) and C)
F) None of the above

Question 10

Why do polar bodies form?

Accepted Answer

A)   They nurse the egg as it leaves the follicle.
B)   This is extra chromosomal material representing the X chromosome in each female cell.
C)   They orient the sperm toward the egg.
D)   They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg.
E)   They orient the egg for penetration by the sperm.F) A) and E)
G) A) and B) D

Question 11

It is estimated that an average of two or three cross-overs occur per human chromosome.

Accepted Answer

A) True 
 B)False

Question 12

The genus Lacerta is composed of a species of lizards that are female and do not mate. They undergo "endomitosis" where one extra chromosome replication results in a tetraploid cell before meiosis begins. Normal female 2n offspring result without fertilization. What change(s)  from regular meiosis (in preparation for fertilization)  would be required to produce this system?

Accepted Answer

A)   The haploid cell products of meiosis II fuse.
B)   Meiosis stops after meiosis I and does not proceed to meiosis II.
C)   Cytokinesis does not follow "endomitosis" that results in a tetraploid cell.
D)   During anaphase II, the sister centromeres fail to separate and daughter cells will not form.
E)   During anaphase II, the daughter chromosomes are non-disjunctive and are all pulled to one daughter cell.F) None of the above
G) A) and E)

Question 13

Study the diagram to answer the following questions.
  
A. What process is occurring in this diagram?
B. What structures, represented by (ABCD) and (abcd), are participating in this process?
C. How has this changed the structures?

Accepted Answer

A. Crossing over is occurring. It is the...

Question 14

Sexual reproduction brings about genetic variation within a species. Why is genetic variation so important to the survival of a species? Support your answer with an example.

Accepted Answer

Genetic variation is crucial for the sur...

Question 15

During which stage of meiosis are the bivalents arranged along the equator?

Accepted Answer

A)   prophase I
B)   metaphase II
C)   anaphase II
D)   prophase II
E)   metaphase IF) A) and D)
G) C) and E)

Question 16

The correct number of chromosomes in a species is known as aneuploidy.

Accepted Answer

A) True 
 B)False

Question 17

Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. Today we know that

Accepted Answer

A)   offspring will be identical to one another and demonstrate traits exactly halfway between the parents' traits.
B)   offspring can vary from receiving over 99% of one parent's genes to receiving over 99% of the other parent's genes.
C)   offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over.
D)   offspring inherit copies of the same 23 pair of chromosomes from each of their parents but the rate of crossing-over makes them very dissimilar.
E)   there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over.F) D) and E)
G) A) and C)

Question 18

All of the following are true concerning Down Syndrome EXCEPT

Accepted Answer

A)   it is caused by autosomal trisomy 21.
B)   in 23% of cases, the sperm contributes the extra chromosome.
C)   it is the most common trisomy in humans.
D)   chances of a woman having a child with Down Syndrome decreases with her age.E) None of the above
F) B) and C)

Question 19

During which stage of meiosis does the homologue separation occur?

Accepted Answer

A)   prophase I
B)   anaphase I
C)   telophase I
D)   prophase II
E)   anaphase IIF) A) and B)
G) C) and E)

Question 20

Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis.

Accepted Answer

A) True 
 B)False

Exam 10: Meiosis and Sexual Reproduction

A change in the chromosome number resulting from nondisjunction is called euploidy.

Correct Answer
verified

If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.

Correct Answer
verified

Which statement is NOT true about homologues in meiosis I?

Correct Answer
verified
C

What is the importance of crossing-over?

Correct Answer
verified

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Correct Answer
verified

It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. One main reason would be

Correct Answer
verified

Which is NOT true about daughter cells of mitosis or meiosis?

Correct Answer
verified
E

Interkinesis is different from interphase in which way?

Correct Answer
verified

Where in the human male does spermatogenesis occur?

Correct Answer
verified

Why do polar bodies form?

Correct Answer
verified
D

It is estimated that an average of two or three cross-overs occur per human chromosome.

Correct Answer
verified

Correct Answer
verified

Study the diagram to answer the following questions. A. What process is occurring in this diagram? B. What structures, represented by (ABCD) and (abcd), are participating in this process? C. How has this changed the structures?

Correct Answer
verified
A. Crossing over is occurring. It is the...
View Answer

Sexual reproduction brings about genetic variation within a species. Why is genetic variation so important to the survival of a species? Support your answer with an example.

Correct Answer
Answered by ExamLex AI
Genetic variation is crucial for the sur...
View Answer

During which stage of meiosis are the bivalents arranged along the equator?

Correct Answer
verified

The correct number of chromosomes in a species is known as aneuploidy.

Correct Answer
verified

Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. Today we know that

Correct Answer
verified

All of the following are true concerning Down Syndrome EXCEPT

Correct Answer
verified

During which stage of meiosis does the homologue separation occur?

Correct Answer
verified

Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis.

Correct Answer
verified

Exam 10: Meiosis and Sexual Reproduction

A change in the chromosome number resulting from nondisjunction is called euploidy.

Correct AnswerverifiedShow Answer

If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.

Correct AnswerverifiedShow Answer

Which statement is NOT true about homologues in meiosis I?

Correct AnswerverifiedC

What is the importance of crossing-over?

Correct AnswerverifiedShow Answer

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Correct AnswerverifiedShow Answer

It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. One main reason would be

Correct AnswerverifiedShow Answer

Which is NOT true about daughter cells of mitosis or meiosis?

Correct AnswerverifiedE

Interkinesis is different from interphase in which way?

Correct AnswerverifiedShow Answer

Where in the human male does spermatogenesis occur?

Correct AnswerverifiedShow Answer

Why do polar bodies form?

Correct AnswerverifiedD

It is estimated that an average of two or three cross-overs occur per human chromosome.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Study the diagram to answer the following questions. A. What process is occurring in this diagram? B. What structures, represented by (ABCD) and (abcd), are participating in this process? C. How has this changed the structures?

Correct AnswerverifiedA. Crossing over is occurring. It is the...View AnswerShow Answer

Sexual reproduction brings about genetic variation within a species. Why is genetic variation so important to the survival of a species? Support your answer with an example.

Correct AnswerAnswered by ExamLex AIGenetic variation is crucial for the sur...View AnswerShow Answer

During which stage of meiosis are the bivalents arranged along the equator?

Correct AnswerverifiedShow Answer

The correct number of chromosomes in a species is known as aneuploidy.

Correct AnswerverifiedShow Answer

Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. Today we know that

Correct AnswerverifiedShow Answer

All of the following are true concerning Down Syndrome EXCEPT

Correct AnswerverifiedShow Answer

During which stage of meiosis does the homologue separation occur?

Correct AnswerverifiedShow Answer

Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A. Crossing over is occurring. It is the...
View Answer

Correct Answer
Answered by ExamLex AI
Genetic variation is crucial for the sur...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified