Question 1

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 syndrome 
A)  Turner syndrome 
B)  Klinefelter syndrome 
C)  Jacobs syndrome 
D)  Down syndrome 
E)  Williams syndrome

Question 2

During which phase of meiosis will the homologous chromosomes pair up?

Accepted Answer

A)  prophase I 
B)  prophase II 
C)  anaphase I 
D)  telophase II 
E)  metaphase I 
A)  prophase I 
B)  prophase II 
C)  anaphase I 
D)  telophase II 
E)  metaphase I

Question 3

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. 
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.

Question 4

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

Accepted Answer

A)  2 
B)  4 
C)  0 
D)  1 
E)  3 
A)  2 
B)  4 
C)  0 
D)  1 
E)  3

Question 5

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, 2 
A)  1, 3 
B)  2, 2 
C)  3, 1 
D)  2, 1 
E)  1, 2

Question 6

Which phase of meiosis matches those of mitosis in regards to the events occurring in the cell?

Accepted Answer

A)  anaphase II and anaphase 
B)  anaphase I and prophase 
C)  metaphase I and prophase 
D)  telophase II and telophase 
E)  none of the phases of meiosis will match up with mitosis 
A)  anaphase II and anaphase 
B)  anaphase I and prophase 
C)  metaphase I and prophase 
D)  telophase II and telophase 
E)  none of the phases of meiosis will match up with mitosis

Question 7

The product(s) of meiosis I in spermatogenesis is/are

Accepted Answer

A)  primary spermatocytes. 
B)  secondary spermatocytes. 
C)  spermatids. 
D)  spermatazoa. 
E)  2 identical cells. 
A)  primary spermatocytes. 
B)  secondary spermatocytes. 
C)  spermatids. 
D)  spermatazoa. 
E)  2 identical cells.

Question 8

In which stage of meiosis do homologous chromosomes separate from each other?

Accepted Answer

A)  metaphase I 
B)  metaphase II 
C)  anaphase I 
D)  anaphase II 
E)  interkinesis 
A)  metaphase I 
B)  metaphase II 
C)  anaphase I 
D)  anaphase II 
E)  interkinesis

Question 9

What are the two parts of the cell cycle?

Accepted Answer

A)  apoptosis and interphase 
B)  mitosis and cytokinesis 
C)  nucleus and cytoplasm 
D)  mitosis and meiosis 
E)  interphase and cell division 
A)  apoptosis and interphase 
B)  mitosis and cytokinesis 
C)  nucleus and cytoplasm 
D)  mitosis and meiosis 
E)  interphase and cell division

Question 10

What happens at the G2 checkpoint?

Accepted Answer

A)  The cell makes a commitment to divide. 
B)  The cell receives external signals to divide. 
C)  The cell checks that the DNA has replicated. 
D)  The cell makes sure the chromosomes are lined up correctly. 
E)  The cell enters G0. 
A)  The cell makes a commitment to divide. 
B)  The cell receives external signals to divide. 
C)  The cell checks that the DNA has replicated. 
D)  The cell makes sure the chromosomes are lined up correctly. 
E)  The cell enters G0.

Question 11

When a child is born, mitosis ceases to function.

Accepted Answer

A) True 
 B)False

Question 12

From a karyotype, you could tell all of the following about the cell except whether

Accepted Answer

A)  a fusion of two chromosomes had occurred. 
B)  a translocation had occurred between two chromosomes. 
C)  one chromosome was missing. 
D)  there were three copies of a chromosome present. 
E)  a particular gene contained a mutation. 
A)  a fusion of two chromosomes had occurred. 
B)  a translocation had occurred between two chromosomes. 
C)  one chromosome was missing. 
D)  there were three copies of a chromosome present. 
E)  a particular gene contained a mutation.

Question 13

The centromere is the structure that holds the chromatids together.

Accepted Answer

A) True 
 B)False

Question 14

List the stages of mitosis and explain the key events during each of the stages.

Accepted Answer

Prophase: Centrosomes outside the nucleu

Question 15

External signals such as hormones and growth factors can stimulate a cell to go through the cell cycle.

Accepted Answer

A) True 
 B)False

Question 16

All the products of oogenesis are equal in size and content.

Accepted Answer

A) True 
 B)False

Question 17

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 genitalia 
A)  short stature 
B)  eyelid fold 
C)  flat face 
D)  stubby fingers 
E)  indeterminate genitalia

Question 18

What is the term for the DNA and proteins found within the cell?

Accepted Answer

A)  chromatin 
B)  nucleus 
C)  karyotype 
D)  centromere 
E)  chromatids
F) none of these 
A)  chromatin 
B)  nucleus 
C)  karyotype 
D)  centromere 
E)  chromatids
F) none of these

Question 19

If you are looking at a cell in which 2n = 16, and there appear to be 8 structures lined up at the metaphase plate, then you are looking at

Accepted Answer

A)  mitosis. 
B)  meiosis. 
C)  interphase. 
D)  G2. 
E)  G1. 
A)  mitosis. 
B)  meiosis. 
C)  interphase. 
D)  G2. 
E)  G1.

Question 20

How long does it take to proceed from prophase I to metaphase I in oogenesis?

Accepted Answer

A)  One follows directly after the other. 
B)  There is usually a pause of about 1 hour. 
C)  It varies, but on the order of years. 
D)  There is a pause for a day. 
E)  There is a pause for about a month. 
A)  One follows directly after the other. 
B)  There is usually a pause of about 1 hour. 
C)  It varies, but on the order of years. 
D)  There is a pause for a day. 
E)  There is a pause for about a month.

Exam 18: Patterns of Chromosome Inheritance

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

During which phase of meiosis will the homologous chromosomes pair up?

How are G1 and G2 different?

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

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?

Which phase of meiosis matches those of mitosis in regards to the events occurring in the cell?

The product(s) of meiosis I in spermatogenesis is/are

In which stage of meiosis do homologous chromosomes separate from each other?

What are the two parts of the cell cycle?

What happens at the G2 checkpoint?

When a child is born, mitosis ceases to function.

From a karyotype, you could tell all of the following about the cell except whether

The centromere is the structure that holds the chromatids together.

List the stages of mitosis and explain the key events during each of the stages.

External signals such as hormones and growth factors can stimulate a cell to go through the cell cycle.

All the products of oogenesis are equal in size and content.

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

What is the term for the DNA and proteins found within the cell?

If you are looking at a cell in which 2n = 16, and there appear to be 8 structures lined up at the metaphase plate, then you are looking at

How long does it take to proceed from prophase I to metaphase I in oogenesis?

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How are G₁ and G₂ different?

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