Question 1

In a karyotype,the chromosomes are arranged in order from

Accepted Answer

A)   largest to smallest, with the sex chromosomes at the end.
B)   smallest to largest, with the sex chromosomes at the end.
C)   largest to smallest, including the sex chromosomes.
D)   smallest to largest, including the sex chromosomes.
E)   sex chromosomes first and then smallest to the largest.F) C) and E)
G) C) and D)

Question 2

In humans,how many of the chromosomes are autosomes?

Accepted Answer

A)   22 pairs
B)   22
C)   1 pair
D)   46
E)   23 pairsF) A) and E)
G) B) and E)

Question 3

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.F) A) and B)
G) D) and E)

Question 4

What is the structure that holds the chromatids together?

Accepted Answer

A)   centromere
B)   chromatin
C)   chromosomes
D)   karyotype
E)   none of theseF) A) and E)
G) A) and D)

Question 5

If nondisjunction occurs during meiosis II (to one of the cells resulting from meiosis I) ,how many of the final four products will be abnormal?

Accepted Answer

A)   two
B)   four
C)   none
D)   one
E)   threeF) D) and E)
G) B) and C)

Question 6

Which of the following is not a stage of interphase?

Accepted Answer

A)   cytokinesis
B)   G1
C)   G2
D)   SE) All of the above
F) C) and D)

Question 7

Which type of change in chromosome structure characterizes cri du chat syndrome?

Accepted Answer

A)   deletion
B)   duplication
C)   translocation
D)   inversion
E)   trisomyF) A) and B)
G) C) and D)

Question 8

Independent alignment creates genetic variation.This is associated with which stage of meiosis?

Accepted Answer

A)   prophase I
B)   metaphase I
C)   prophase II
D)   metaphase II
E)   anaphase IIF) All of the above
G) A) and B)

Question 9

How do proto-oncogenes affect the cell cycle?

Accepted Answer

A)   stimulate it
B)   inhibit it
C)   they do not affect the cell cycle
D)   they cause it to temporarily pause and then rapidly accelerate
E)   they rapidly accelerate it and then cause it to pauseF) C) and E)
G) B) and D)

Question 10

Sexual reproduction introduces more genetic variation than does asexual reproduction.

Accepted Answer

A) True 
 B)False

Question 11

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) A) and D)

Question 12

What structure is not divided during cytokinesis?

Accepted Answer

A)   chromosome
B)   cell membrane
C)   cell wall
D)   cytoplasm
E)   endoplasmic reticulumF) B) and C)
G) A) and E)

Question 13

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

Accepted Answer

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

Question 14

In a translocation,all of the DNA is present,and there is only one copy of each piece.

Accepted Answer

A) True 
 B)False

Question 15

How many cells are produced as the result of meiosis and mitosis?

Accepted Answer

A)   four, two
B)   two, two
C)   two, four
D)   four, four
E)   it varies each time the cells go through meiosis and mitosisF) A) and E)
G) A) and D)

Question 16

In what way is spermatogenesis similar to oogenesis?

Accepted Answer

A)   Both occur continuously from puberty on.
B)   Both result in four daughter cells.
C)   Both result in cells with half the diploid chromosome number.
D)   Both are arrested in prophase I.
E)   Both result in one or two polar bodies.F) B) and D)
G) None of the above

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

List the stages of interphase and the events that occur during each of these stages.

Accepted Answer

G₁ stage: The cell grows and returns to n...

Question 19

Following mitosis,the daughter cells are identical to the parent cell.

Accepted Answer

A) True 
 B)False

Question 20

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)   interkinesisF) B) and E)
G) A) and D)

Exam 19: Patterns of Chromosome Inheritance

Independent alignment creates genetic variation.This is associated with which stage of meiosis?

Correct AnswerverifiedShow Answer

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

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In humans,how many of the chromosomes are autosomes?

Correct AnswerverifiedShow Answer

If nondisjunction occurs during meiosis II (to one of the cells resulting from meiosis I) ,how many of the final four products will be abnormal?

Correct AnswerverifiedShow Answer

Following mitosis,the daughter cells are identical to the parent cell.

Correct AnswerverifiedShow Answer

In what way is spermatogenesis similar to oogenesis?

Correct AnswerverifiedShow Answer

What is the structure that holds the chromatids together?

Correct AnswerverifiedShow Answer

In a translocation,all of the DNA is present,and there is only one copy of each piece.

Correct AnswerverifiedShow Answer

How do proto-oncogenes affect the cell cycle?

Correct AnswerverifiedShow Answer

In a karyotype,the chromosomes are arranged in order from

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What happens at the G2 checkpoint?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Sexual reproduction introduces more genetic variation than does asexual reproduction.

Correct AnswerverifiedShow Answer

What structure is not divided during cytokinesis?

Correct AnswerverifiedShow Answer

List the stages of interphase and the events that occur during each of these stages.

Correct AnswerverifiedG1 stage: The cell grows and returns to n...View AnswerShow Answer

Which of the following is not a stage of interphase?

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How many cells are produced as the result of meiosis and mitosis?

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Which type of change in chromosome structure characterizes cri du chat syndrome?

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

Correct AnswerverifiedShow Answer

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What happens at the G₂ checkpoint?

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G₁ stage: The cell grows and returns to n...
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