Question 1

Genetic variation is useful to evolution because environments change.

Accepted Answer

A) True 
 B)False

Question 2

DNA is found in association with proteins within the cell.What is the term for this DNA-protein complex?

Accepted Answer

A)  chromatin 
B)  nucleus 
C)  karyotype 
D)  centromere 
E)  chromatids 
A)  chromatin 
B)  nucleus 
C)  karyotype 
D)  centromere 
E)  chromatids

Question 3

List the stages of meiosis I and explain the events that occur during each stage.

Accepted Answer

Prophase I: Chromosomes become visiblE P

Question 4

If an organism does not undergo meiosis,then it cannot undergo sexual reproduction.

Accepted Answer

A) True 
 B)False

Question 5

In what stage of meiosis does synapsis occur?

Accepted Answer

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

Question 6

Which stage comes directly after interphase?

Accepted Answer

A)  mitosis 
B)  cytokinesis 
C)  G1 
D)  S 
E)  G2 
A)  mitosis 
B)  cytokinesis 
C)  G1 
D)  S 
E)  G2

Question 7

If the parent cell has 24 chromosomes,and each of the daughter cells has 24 chromosomes,then the cell has undergone

Accepted Answer

A)  mitosis. 
B)  meiosis I. 
C)  meiosis II. 
D)  G1 
E)  none of these 
A)  mitosis. 
B)  meiosis I. 
C)  meiosis II. 
D)  G1 
E)  none of these

Question 8

How many chromosome pairs does a human have?

Accepted Answer

A)  23 
B)  25 
C)  46 
D)  50 
E)  92 
A)  23 
B)  25 
C)  46 
D)  50 
E)  92

Question 9

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 10

If there are four pairs of chromosomes,how many different combinations of chromosomes are possible?

Accepted Answer

A)  2 
B)  4 
C)  8 
D)  16 
E)  32 
A)  2 
B)  4 
C)  8 
D)  16 
E)  32

Question 11

Two sister chromatids are held together at the

Accepted Answer

A)  centromere. 
B)  spindle. 
C)  aster. 
D)  telomere. 
E)  autosome. 
A)  centromere. 
B)  spindle. 
C)  aster. 
D)  telomere. 
E)  autosome.

Question 12

What is the genetic makeup of an individual who has inherited Jacobs syndrome?

Accepted Answer

A)  XYY 
B)  XXX 
C)  XXY 
D)  XO 
E)  none of these 
A)  XYY 
B)  XXX 
C)  XXY 
D)  XO 
E)  none of these

Question 13

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

Accepted Answer

A)  one 
B)  two 
C)  four 
D)  three 
E)  none 
A)  one 
B)  two 
C)  four 
D)  three 
E)  none

Question 14

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

Accepted Answer

A)  2 
B)  4 
C)  8 
D)  16 
E)  32 
A)  2 
B)  4 
C)  8 
D)  16 
E)  32

Question 15

At what two checkpoints does the cell check for the integrity of the DNA?

Accepted Answer

A)  G1 and G2 
B)  G1 and mitotic 
C)  G2 and mitotic 
D)  cytokinesis and G2 
E)  G1 and cytokinesis 
A)  G1 and G2 
B)  G1 and mitotic 
C)  G2 and mitotic 
D)  cytokinesis and G2 
E)  G1 and cytokinesis

Question 16

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 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

In a karyotype it can be seen that a homologous pair of duplicated chromosomes will contain how many chromatids?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  six 
A)  one 
B)  two 
C)  three 
D)  four 
E)  six

Question 19

Which aspect of the cytoskeleton is involved in the cleavage furrow?

Accepted Answer

A)  microtubules 
B)  intermediate filaments 
C)  actin filaments 
D)  centrioles 
E)  spindle fibers 
A)  microtubules 
B)  intermediate filaments 
C)  actin filaments 
D)  centrioles 
E)  spindle fibers

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 19: Patterns of Chromosome Inheritance

Genetic variation is useful to evolution because environments change.

DNA is found in association with proteins within the cell.What is the term for this DNA-protein complex?

List the stages of meiosis I and explain the events that occur during each stage.

If an organism does not undergo meiosis,then it cannot undergo sexual reproduction.

In what stage of meiosis does synapsis occur?

Which stage comes directly after interphase?

If the parent cell has 24 chromosomes,and each of the daughter cells has 24 chromosomes,then the cell has undergone

How many chromosome pairs does a human have?

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

If there are four pairs of chromosomes,how many different combinations of chromosomes are possible?

Two sister chromatids are held together at the

What is the genetic makeup of an individual who has inherited Jacobs syndrome?

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

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

At what two checkpoints does the cell check for the integrity of the DNA?

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

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

In a karyotype it can be seen that a homologous pair of duplicated chromosomes will contain how many chromatids?

Which aspect of the cytoskeleton is involved in the cleavage furrow?

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

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