Question 1

Crossing over occurs during ________ and is important because it ________.

Accepted Answer

A) telophase II; creates daughter cells 
B) prophase I; generates variation 
C) anaphase II; separates the homologous pairs 
D) metaphase I; reduces the chromosome number by half 
A) telophase II; creates daughter cells 
B) prophase I; generates variation 
C) anaphase II; separates the homologous pairs 
D) metaphase I; reduces the chromosome number by half

Question 2

The exchange of genetic material between non-sister chromatids of a homologous pair in meiosis is called ________.

Accepted Answer

The answer of The exchange of genetic material between non-sister...

Question 3

Explain two important sources of genetic variation in meiosis.Evolutionarily speaking,why do you think is it important that there is recombination of the genes in meiosis?

Accepted Answer

Crossing over and independent assortment

Question 4

Cancer is associated with problems related to the regulation of ________.

Accepted Answer

A) mitosis 
B) meiosis I 
C) meiosis II 
D) cytokinesis 
A) mitosis 
B) meiosis I 
C) meiosis II 
D) cytokinesis

Question 5

In which stage of mitosis does exchange of genetic material between chromosomes (crossing-over)occur?

Accepted Answer

A) prophase I 
B) anaphase I 
C) prophase II 
D) none of the above 
A) prophase I 
B) anaphase I 
C) prophase II 
D) none of the above

Question 6

The condition in which there is only one representative of a particular chromosome in a cell is called ________.

Accepted Answer

The answer of The condition in which there is only...

Question 7

Match each definition in the first column to the correct term in the second column.
-A specific segment of the chromosome's DNA that directs the synthesis of a single protein.

Accepted Answer

A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I 
A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I

Question 8

The ________ cells are those body cells of humans that contain 23 chromosomes.

Accepted Answer

The answer of The ________ cells are those body cells...

Question 9

Match each definition in the first column to the correct term in the second column.
-The method of reshuffling genes by randomly aligning them in metaphase I.

Accepted Answer

A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I
J) Independent 
A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I
J) Independent

Question 10

Oogenesis is completed at ________.

Accepted Answer

The answer of Oogenesis is completed at ________....

Question 11

The failure of either homologous chromosomes to separate during meiosis I or sister chromatids to separate during meiosis II is called ________.

Accepted Answer

The answer of The failure of either homologous chromosomes to...

Question 12

How do mitosis and meiosis differ from each other?

Accepted Answer

A) The goal of mitosis is to produce cells that are genetically identical to the original parent cell; the goal of meiosis is to produce cells that contain twice the number of chromosomes as the original parent cell. 
B) The cells formed by mitosis are diploid; the cells formed by meiosis are haploid. 
C) Mitosis results in the production of gametes; meiosis results in the production of cells, which are used for the organism's growth and replacement of damaged cells. 
D) Synapsis and crossing over occur in mitosis to ensure new combinations of genetic material; synapsis and crossing over do not occur in meiosis. 
A) The goal of mitosis is to produce cells that are genetically identical to the original parent cell; the goal of meiosis is to produce cells that contain twice the number of chromosomes as the original parent cell. 
B) The cells formed by mitosis are diploid; the cells formed by meiosis are haploid. 
C) Mitosis results in the production of gametes; meiosis results in the production of cells, which are used for the organism's growth and replacement of damaged cells. 
D) Synapsis and crossing over occur in mitosis to ensure new combinations of genetic material; synapsis and crossing over do not occur in meiosis.

Question 13

Children born with Down syndrome have inherited an extra chromosome so their diploid number is 47 rather than 46 chromosomes.What is this genetic condition called?

Accepted Answer

A) trisomy 21 
B) triploid 
C) haploid 21 
D) monoploidy 
A) trisomy 21 
B) triploid 
C) haploid 21 
D) monoploidy

Question 14

If a cell begins mitosis with 36 chromosomes,there will be ________ chromosomes in each cell after mitosis and each daughter cell will be ________ genetically.

Accepted Answer

A) 36; identical 
B) 36; different 
C) 18; identical 
D) 18; different 
A) 36; identical 
B) 36; different 
C) 18; identical 
D) 18; different

Question 15

Eukaryotic cell division consists of interphase and cell division.Explain what happens in the three parts of interphase (G1,S and G2).

Accepted Answer

In the "S" stage DNA synthesis occurs.Ch

Question 16

Match each definition in the first column to the correct term in the second column.
-The division of the cytoplasm,which occurs at the end of mitosis and meiosis.

Accepted Answer

A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I 
A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I

Question 17

The ________ are the 22 pairs of chromosomes not including the X and Y chromosomes.

Accepted Answer

The answer of The ________ are the 22 pairs of...

Question 18

Match each definition in the first column to the correct term in the second column.
-A phase in meiosis in which homologous pairs are separated from each other.

Accepted Answer

A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I 
A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I

Question 19

Match each definition in the first column to the correct term in the second column.
-Longest period of the cell cycle.

Accepted Answer

A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I 
A) Interphase 
B) Telophase 
C) Cytokinesis 
D) Haploid 
E) Metaphase
F)Gene
G)Anaphase
H)Crossing over
I)Anaphase I

Question 20

The preparation for cell division that precedes mitosis is called ________.

Accepted Answer

The answer of The preparation for cell division that precedes...

Exam 19: Chromosomes and Cell Division

Crossing over occurs during ________ and is important because it ________.

The exchange of genetic material between non-sister chromatids of a homologous pair in meiosis is called ________.

Explain two important sources of genetic variation in meiosis.Evolutionarily speaking,why do you think is it important that there is recombination of the genes in meiosis?

Cancer is associated with problems related to the regulation of ________.

In which stage of mitosis does exchange of genetic material between chromosomes (crossing-over)occur?

The condition in which there is only one representative of a particular chromosome in a cell is called ________.

Match each definition in the first column to the correct term in the second column. -A specific segment of the chromosome's DNA that directs the synthesis of a single protein.

The ________ cells are those body cells of humans that contain 23 chromosomes.

Match each definition in the first column to the correct term in the second column. -The method of reshuffling genes by randomly aligning them in metaphase I.

Oogenesis is completed at ________.

The failure of either homologous chromosomes to separate during meiosis I or sister chromatids to separate during meiosis II is called ________.

How do mitosis and meiosis differ from each other?

Children born with Down syndrome have inherited an extra chromosome so their diploid number is 47 rather than 46 chromosomes.What is this genetic condition called?

If a cell begins mitosis with 36 chromosomes,there will be ________ chromosomes in each cell after mitosis and each daughter cell will be ________ genetically.

Eukaryotic cell division consists of interphase and cell division.Explain what happens in the three parts of interphase (G1,S and G2).

Match each definition in the first column to the correct term in the second column. -The division of the cytoplasm,which occurs at the end of mitosis and meiosis.

The ________ are the 22 pairs of chromosomes not including the X and Y chromosomes.

Match each definition in the first column to the correct term in the second column. -A phase in meiosis in which homologous pairs are separated from each other.

Match each definition in the first column to the correct term in the second column. -Longest period of the cell cycle.

The preparation for cell division that precedes mitosis is called ________.

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Crossing over occurs during and is important because it .

If a cell begins mitosis with 36 chromosomes,there will be chromosomes in each cell after mitosis and each daughter cell will be genetically.