Question 1

Suppose that nondisjunction occurs during meiosis II in oogenesis,and each of the resulting 4 cells is fertilized with a normal sperm.How many cells are normal and how many have a chromosomal trisomy?

Accepted Answer

A)   1,3
B)   2,2
C)   3,1
D)   2,1
E)   1,2F) B) and D)
G) A) and B)

Question 2

From Figure 18.1 it can be seen that a homologous pair of chromosomes contains how many chromatids?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   sixF) C) and D)
G) A) and B)

Question 3

At which stage of mitosis do you first see the chromosomes appearing?

Accepted Answer

A)   prophase
B)   metaphase
C)   anaphase
D)   telophaseE) None of the above
F) C) and D)

Question 4

Which of the following is not a symptom of Down syndrome?

Accepted Answer

A)   short stature
B)   eyelid fold
C)   flat face
D)   stubby fingers
E)   indeterminate genitaliaF) A) and B)
G) B) and E)

Question 5

If a cell has 4 pair of chromosomes,after mitosis each daughter cell will have how many chromosomes?

Accepted Answer

A)   2
B)   4
C)   8
D)   16
E)   32F) D) and E)
G) A) and D)

Question 6

Which cell could you not use to produce a karyotype?

Accepted Answer

A)   white blood cells
B)   red blood cells
C)   epithelial cells
D)   smooth muscle cells
E)   skeletal muscle cellsF) C) and D)
G) A) and B)

Question 7

In both spermatogenesis and oogenesis,one sperm/egg forms from one primary spermatocyte/oocyte.

Accepted Answer

A) True 
 B)False

Question 8

How are G1 and G2 different?

Accepted Answer

A)   The cell copies its DNA during G1 but not G2.
B)   The cell does not grow during G1 but doubles its organelles in G2.
C)   In G1, the cell prepares to synthesize its DNA and in G2 it synthesizes the proteins needed for cell division.
D)   The cell spends much more time in G2 than in G1.
E)   Mitosis occurs during G1 but not during G2.F) B) and D)
G) All of the above

Question 9

If nondisjunction occurs during meiosis I,how many of the final 4 products will be abnormal?

Accepted Answer

A)   1
B)   2
C)   4D) B) and C)
E) All of the above

Question 10

There is no mechanism to ensure the exact partitioning of the cytoplasm as there is of the DNA.

Accepted Answer

A) True 
 B)False

Question 11

Which comes first: mitosis or cytokinesis?

Accepted Answer

A)   mitosis
B)   cytokinesisC) A) and B)
D) undefined

Question 12

Which of the following is part of the mitotic spindle?

Accepted Answer

A)   sister chromatid
B)   nucleolus
C)   nuclear membrane
D)   aster
E)   centromereF) All of the above
G) C) and D)

Question 13

Which of the following syndromes has a karyotype with a missing X chromosome?

Accepted Answer

A)   Turner syndrome
B)   Klinefelter syndrome
C)   Jacobs syndrome
D)   Down syndrome
E)   Williams syndromeF) C) and D)
G) All of the above

Question 14

When do the centromeres divide in meiosis?

Accepted Answer

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

Question 15

In a karyotype,each chromosome contains two sister chromatids.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not a stage of mitosis?

Accepted Answer

A)   interphase
B)   prophase
C)   metaphase
D)   anaphase
E)   telophaseF) C) and E)
G) B) and C)

Question 17

Which of the following is not a reason chorionic villi sampling is used to determine the fetal karyotype?

Accepted Answer

A)   The results of the karyotype can be obtained ealrier than with an amniocentesis.
B)   There is no danger to the fetus in removing chorionic villi.
C)   The chorion is the fetal part of the placenta.
D)   Prospective parents want to know whether a chromosomal abnormality exists in the fetus.
E)   It is relatively to remove chorionic villi with a suction tube.F) A) and E)
G) None of the above

Question 18

When a child is born,mitosis ceases to function.

Accepted Answer

A) True 
 B)False

Question 19

When does a chromosome go from one chromatid to two sister chromatids?

Accepted Answer

A)   during G1 of interphase
B)   during S of interphase
C)   during G2 of interphase
D)   during mitosis
E)   during cytokinesisF) A) and D)
G) All of the above

Question 20

If the secondary oocyte is not fertilized,it does not complete meiosis II.

Accepted Answer

A) True 
 B)False

Exam 18: Patterns of Chromosome Inheritance

If a cell has 4 pair of chromosomes,after mitosis each daughter cell will have how many chromosomes?

Correct AnswerverifiedShow Answer

At which stage of mitosis do you first see the chromosomes appearing?

Correct AnswerverifiedShow Answer

When do the centromeres divide in meiosis?

Correct AnswerverifiedShow Answer

Which of the following is part of the mitotic spindle?

Correct AnswerverifiedShow Answer

From Figure 18.1 it can be seen that a homologous pair of chromosomes contains how many chromatids?

Correct AnswerverifiedShow Answer

Suppose that nondisjunction occurs during meiosis II in oogenesis,and each of the resulting 4 cells is fertilized with a normal sperm.How many cells are normal and how many have a chromosomal trisomy?

Correct AnswerverifiedShow Answer

In a karyotype,each chromosome contains two sister chromatids.

Correct AnswerverifiedShow Answer

If nondisjunction occurs during meiosis I,how many of the final 4 products will be abnormal?

Correct AnswerverifiedShow Answer

Which of the following is not a reason chorionic villi sampling is used to determine the fetal karyotype?

Correct AnswerverifiedShow Answer

When does a chromosome go from one chromatid to two sister chromatids?

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If the secondary oocyte is not fertilized,it does not complete meiosis II.

Correct AnswerverifiedShow Answer

Which of the following is not a stage of mitosis?

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When a child is born,mitosis ceases to function.

Correct AnswerverifiedShow Answer

There is no mechanism to ensure the exact partitioning of the cytoplasm as there is of the DNA.

Correct AnswerverifiedShow Answer

Which of the following is not a symptom of Down syndrome?

Correct AnswerverifiedShow Answer

Which of the following syndromes has a karyotype with a missing X chromosome?

Correct AnswerverifiedShow Answer

Which comes first: mitosis or cytokinesis?

Correct AnswerverifiedShow Answer

Which cell could you not use to produce a karyotype?

Correct AnswerverifiedShow Answer

In both spermatogenesis and oogenesis,one sperm/egg forms from one primary spermatocyte/oocyte.

Correct AnswerverifiedShow Answer

How are G1 and G2 different?

Correct AnswerverifiedShow Answer

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How are G₁ and G₂ different?

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