Question 1

What feature distinguishes an embryo from a zygote?

Accepted Answer

A)   An embyro's cells are diploid, whereas a zygote's cells are haploid.
B)   A zygote consists of a single cell, whereas an embryo is multicellular.
C)   An embryo has not differentiated to the extent that rudimentary organs are present, whereas a zygote's cells have differentiated significantly.
D)   A zygote is generally much larger than an embryo.

Question 2

The two sister chromatids of a single chromosome are held together by a

Accepted Answer

A)   centrosome.
B)   spindle fiber.
C)   centromere.
D)   chromatin.

Question 3

Unlike mitosis,during meiosis II,the nuclear membrane does not break down.

Accepted Answer

A) True 
 B)False

Question 4

At the completion of mitosis,the nucleus of a human somatic cell has ________ chromosomes.

Accepted Answer

A)   23
B)   46
C)   92
D)   184

Question 5

The goal of ________ is to increase genetic diversity by creating a new diploid individual from haploid cells that are derived from two different individuals; the aforementioned haploid cells join together to make a zygote during a process called ________.

Accepted Answer

sexual reproduction;...

Question 6

The four cells that result from meiosis are not diploid like the cells produced by mitosis; instead,they are ________.

Accepted Answer

The answer of The four cells that result from meiosis...

Question 7

Which of the following sequences correctly represents the levels of DNA packing,from simplest to most dense?

Accepted Answer

A)   DNA strand → chromatin → chromosome
B)   chromosome → chromatin → DNA strand
C)   DNA strand → chromosome → chromatin
D)   chromatin → DNA strand → centromere

Question 8

After a single cell undergoes meiosis in a male,how many sperm cells will be produced?

Accepted Answer

A)   two
B)   four
C)   12
D)   16

Question 9

The reduction division of meiosis has occurred when

Accepted Answer

A)   bivalents are cut in half by proteins in their centromeres.
B)   half of the bivalents line up on each side of the metaphase plate.
C)   the first cell division of meiosis is complete.
D)   the second cell division of meiosis is complete.

Question 10

Compared with the amount of genetic material in a generalized body cell,gametes contain

Accepted Answer

A)   half the amount.
B)   the same amount.
C)   twice the amount.
D)   four times the amount.

Question 11

Interphase is an uneventful resting stage of the cell division cycle.

Accepted Answer

A) True 
 B)False

Question 12

Cell division,which is the climax of the cell cycle,consists of

Accepted Answer

A)   chromosome replication and separation.
B)   the breakup of the nucleus at the metaphase plate.
C)   cytokinesis plus mitosis or meiosis.
D)   the formation of a new karyotype.

Question 13

The old saying that everyone has a double is likely to be true; except for genetic mutations,the number of meiotically possible recombinations of human DNA is much smaller than the total number of people in the world.

Accepted Answer

A) True 
 B)False

Question 14

Biologists believe the process of mitosis evolved from binary fission.What are the similarities between these two processes?

Accepted Answer

A)   In both processes, the DNA that is being separated is attached to a membrane.
B)   Both processes necessarily involve the separation of more than one piece of DNA.
C)   Both processes include DNA segregation.
D)   DNA must be tightly packaged into chromosomes before either process can begin.

Question 15

Why must DNA be packed into chromosomes before mitosis or meiosis can occur?

Accepted Answer

A)   In their unpacked state, the DNA strands would be difficult to pull apart during cell division.
B)   The zygote would be unable to live if the DNA was not packed into chromosomes.
C)   We would be unable to see the karyotype if the DNA was not packed into chromosomes.
D)   Some of the genes would escape during cell division if they were not tightly packed into chromosomes.

Question 16

Both meiosis I and meiosis II decrease the number of chromosomes in a cell.

Accepted Answer

A) True 
 B)False

Question 17

Meiosis I is called a reduction division because

Accepted Answer

A)   the need for mitosis is reduced.
B)   the time it takes for the cell to divide is reduced.
C)   the number of chromosomes goes from diploid to haploid.
D)   the cell's size is reduced.

Question 18

If a plant has a karyotype of 18 chromosomes,how many chromosomes would each of its gametes have?

Accepted Answer

A)   36
B)   18
C)   nine
D)   six

Question 19

The sequence of events in meiosis II is prophase II,________,anaphase II,and telophase II,which is accompanied by cytokinesis.

Accepted Answer

The answer of The sequence of events in meiosis II...

Question 20

During mitosis,the number and shape of an organism's chromosomes become obvious.This set of identifiable chromosomes can be arranged into a diagram of the organism; this diagram is known as a ________.

Accepted Answer

The answer of During mitosis,the number and shape of an...

Exam 7: Cell Division

During mitosis,the number and shape of an organism's chromosomes become obvious.This set of identifiable chromosomes can be arranged into a diagram of the organism; this diagram is known as a ________.

Correct AnswerverifiedShow Answer

Meiosis I is called a reduction division because

Correct AnswerverifiedShow Answer

The four cells that result from meiosis are not diploid like the cells produced by mitosis; instead,they are ________.

Correct AnswerverifiedShow Answer

After a single cell undergoes meiosis in a male,how many sperm cells will be produced?

Correct AnswerverifiedShow Answer

The reduction division of meiosis has occurred when

Correct AnswerverifiedShow Answer

The sequence of events in meiosis II is prophase II,________,anaphase II,and telophase II,which is accompanied by cytokinesis.

Correct AnswerverifiedShow Answer

Biologists believe the process of mitosis evolved from binary fission.What are the similarities between these two processes?

Correct AnswerverifiedShow Answer

Interphase is an uneventful resting stage of the cell division cycle.

Correct AnswerverifiedShow Answer

Compared with the amount of genetic material in a generalized body cell,gametes contain

Correct AnswerverifiedShow Answer

Which of the following sequences correctly represents the levels of DNA packing,from simplest to most dense?

Correct AnswerverifiedShow Answer

What feature distinguishes an embryo from a zygote?

Correct AnswerverifiedShow Answer

Cell division,which is the climax of the cell cycle,consists of

Correct AnswerverifiedShow Answer

Both meiosis I and meiosis II decrease the number of chromosomes in a cell.

Correct AnswerverifiedShow Answer

At the completion of mitosis,the nucleus of a human somatic cell has ________ chromosomes.

Correct AnswerverifiedShow Answer

The two sister chromatids of a single chromosome are held together by a

Correct AnswerverifiedShow Answer

Unlike mitosis,during meiosis II,the nuclear membrane does not break down.

Correct AnswerverifiedShow Answer

Why must DNA be packed into chromosomes before mitosis or meiosis can occur?

Correct AnswerverifiedShow Answer

The goal of ________ is to increase genetic diversity by creating a new diploid individual from haploid cells that are derived from two different individuals; the aforementioned haploid cells join together to make a zygote during a process called ________.

Correct Answerverifiedsexual reproduction;...View AnswerShow Answer

If a plant has a karyotype of 18 chromosomes,how many chromosomes would each of its gametes have?

Correct AnswerverifiedShow Answer

The old saying that everyone has a double is likely to be true; except for genetic mutations,the number of meiotically possible recombinations of human DNA is much smaller than the total number of people in the world.

Correct AnswerverifiedShow Answer

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The goal of is to increase genetic diversity by creating a new diploid individual from haploid cells that are derived from two different individuals; the aforementioned haploid cells join together to make a zygote during a process called .

Correct Answer
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sexual reproduction;...
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