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What chromosomes belong to a normal human male?


A) 22 autosomes and two Y chromosomes
B) 44 autosomes and two Y chromosomes
C) 44 autosomes, one X chromosome, and one Y chromosome
D) 46 autosomes, one X chromosome, and one Y chromosome

E) All of the above
F) C) and D)

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A karyotype (a chromosome display) would be unable to determine ______.


A) sex
B) Down syndrome
C) Turner syndrome
D) eye color

E) B) and C)
F) A) and D)

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Which of the following is the best description of the events of anaphase I?


A) Half of the chromosomes inherited from the mother go to one pole along with half of the chromosomes inherited from the father.
B) Sister chromatids separate and the daughter chromosomes migrate to opposite poles.
C) Homologous chromosomes randomly separate and migrate to opposite poles.
D) All of the chromosomes inherited from the mother go to one pole of the cell, and all of the chromosomes inherited from the father go to the other pole.

E) A) and C)
F) B) and C)

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In meiosis,how does prophase I differ from prophase II?


A) During prophase I there is one diploid cell; during prophase II there are two haploid cells.
B) During prophase I chromosomes line up single file in the middle of the cell; during prophase II the chromosomes line up in double file in the middle of the cell.
C) During prophase I the chromosomes coil up; the chromosomes are not coiled up during prophase II.
D) In prophase I the sister chromatids are attached; in prophase II the sister chromatids are separated.

E) A) and B)
F) A) and C)

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During metaphase I,______.


A) crossing over occurs
B) homologous chromosomes line up in the middle of the cell
C) the nuclear envelope breaks up
D) sister chromatids separate and migrate to opposite poles

E) All of the above
F) C) and D)

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Genetic variation is accomplished by all but one of the following.Which is it?


A) the events of meiosis I
B) crossing over
C) independent assortment
D) the events of meiosis II

E) None of the above
F) All of the above

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Please read the following paragraph and answer the following question(s) . Amanda's parents realized that her body was not developing properly about the time she was 12 years old. She was shorter than most of her friends and was not going through changes normally associated with female puberty. They took her to a doctor who initially diagnosed Amanda with Turner Syndrome because of her physical features. He ordered a karyotype that confirmed his diagnosis. Amanda was born with only one X chromosome. Although there is no specific cure, the doctor was able to treat her and correct some of the problems associated with the condition. For example, she received growth hormone to improve her growth and estrogen to help her develop the physical changes of puberty. -With respect to her sex chromosomes,Amanda would be designated as ______.


A) XYY
B) XO
C) XOY
D) XX

E) A) and B)
F) All of the above

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What chromosomes belong to a normal human female?


A) 22 autosomes and 2 X chromosomes
B) 44 autosomes and 2 X chromosomes
C) 44 autosomes, one X chromosome, and one Y chromosome
D) 46 autosomes and two X chromosomes

E) A) and B)
F) A) and C)

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Anaphase II is essentially the same as mitotic anaphase except that in anaphase II ______ and in mitotic anaphase ______.


A) the cells are diploid... the cells are haploid
B) chromosomes line up double file in the middle of the cell... chromosomes line up single file in the middle of the cell
C) crossing over occurs... crossing over does not occur
D) the cells are haploid and sister chromatids separate... the cells are diploid and sister chromatids separate

E) None of the above
F) All of the above

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As shown in the following figure,plant cell cytokinesis differs from animal cell cytokinesis because ______. As shown in the following figure,plant cell cytokinesis differs from animal cell cytokinesis because ______.   A)  plant cells produce more daughter cells B)  plant cells form a cell plate and animal cells do not C)  animal cells produce more daughter cells D)  animal cells form a cell plate and plant cells do not


A) plant cells produce more daughter cells
B) plant cells form a cell plate and animal cells do not
C) animal cells produce more daughter cells
D) animal cells form a cell plate and plant cells do not

E) B) and C)
F) A) and B)

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Upon completion of telophase I and cytokinesis,there is(are) ______ cell(s) .


A) four haploid
B) two diploid
C) two haploid
D) one diploid

E) B) and D)
F) A) and B)

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During telophase ______.


A) the events of prophase are reversed
B) chromosomes line up in the middle of the cell
C) sister chromatids separate
D) the nuclear envelope breaks up

E) None of the above
F) All of the above

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Which of the following is a characteristic seen in prophase I that does not occur in prophase II?


A) Chromosomes move to the middle of the cell.
B) Spindle formation occurs.
C) Chromosomes have been duplicated.
D) Crossing over occurs.

E) A) and D)
F) None of the above

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During metaphase ______.


A) the nuclear envelope breaks up
B) sister chromatids separate
C) centromeres divide
D) chromosomes line up in the middle of the cell

E) A) and B)
F) All of the above

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The cell cycle results in the production of ______.


A) four cells, each with the same amount of genetic material and the same genetic information
B) two cells, each with the same amount of genetic material but with different genetic information
C) two cells, each with the same amount of genetic material and the same genetic information
D) four cells, each with the same amount of genetic material but with different genetic information

E) B) and C)
F) A) and B)

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The correct sequence of stages of mitosis is ______.


A) prophase, metaphase, anaphase, telophase
B) telophase, prophase, interphase, anaphase, metaphase
C) anaphase, interphase, prophase, metaphase, telophase
D) interphase, prophase, metaphase, anaphase, telophase

E) A) and B)
F) A) and C)

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This diagram of the human life cycle shows that ______. This diagram of the human life cycle shows that ______.   A)  meiosis produces a diploid zygote B)  meiosis produces haploid sperm and egg cells C)  fertilization produces a haploid zygote D)  a diploid zygote undergoes meiosis to produce an adult human


A) meiosis produces a diploid zygote
B) meiosis produces haploid sperm and egg cells
C) fertilization produces a haploid zygote
D) a diploid zygote undergoes meiosis to produce an adult human

E) None of the above
F) B) and C)

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Which of these events occurs during anaphase?


A) Sister chromatids separate.
B) Chromosomes line up in the middle of the cell.
C) The nuclear envelope reappears.
D) The nuclear envelope breaks up.

E) B) and C)
F) None of the above

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The karyotype below shows ______. The karyotype below shows ______.   A)  abnormal sex chromosomes B)  trisomy 21, a cause of Klinefelter syndrome C)  Turner syndrome D)  trisomy 21, a cause of Down syndrome


A) abnormal sex chromosomes
B) trisomy 21, a cause of Klinefelter syndrome
C) Turner syndrome
D) trisomy 21, a cause of Down syndrome

E) B) and D)
F) B) and C)

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The chromosomes of eukaryotic cells are found in the ______.


A) nucleus
B) centriole
C) Golgi apparatus
D) nucleolus

E) A) and B)
F) A) and C)

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