Question 1

During anaphase I,which of the following pairs will move to opposite poles? (For purposes of this question,assume that there were no crossing over events. )

Accepted Answer

A) A B C D E F G and A B C D E F G to one pole;a b c d e f g and a b c d e f g to the other pole 
B) A B C D E F G and a b c d e f g to one pole;A B C D E F G and a b c d e f g to the other pole 
C) By anaphase I,only two chromatids remain,so A B C D E F G will go to one pole and a b c d e f g will go to the other pole. 
D) Neither.The pairs separate in anaphase II,not anaphase I. 
A) A B C D E F G and A B C D E F G to one pole;a b c d e f g and a b c d e f g to the other pole 
B) A B C D E F G and a b c d e f g to one pole;A B C D E F G and a b c d e f g to the other pole 
C) By anaphase I,only two chromatids remain,so A B C D E F G will go to one pole and a b c d e f g will go to the other pole. 
D) Neither.The pairs separate in anaphase II,not anaphase I.

Question 2

You are studying meiosis in an organism that has 28 chromosomes as its diploid number.How many chromosomes will the cell have after meiosis II,but before cytokinesis?

Accepted Answer

A) 14 
B) 28 
C) 56 
D) cannot determine from the information provided 
A) 14 
B) 28 
C) 56 
D) cannot determine from the information provided

Question 3

In animals,the cells that will eventually undergo meiosis to produce gametes are set aside early in the development.These are

Accepted Answer

A) haploid cells. 
B) germline cells. 
C) sex cells. 
D) zygotes. 
E) sperm and egg cells. 
A) haploid cells. 
B) germline cells. 
C) sex cells. 
D) zygotes. 
E) sperm and egg cells.

Question 4

The four haploid cells resulting from meiosis may further divide by mitosis in all of the following organisms except?

Accepted Answer

A) plants 
B) fungi 
C) many protists 
D) animals 
A) plants 
B) fungi 
C) many protists 
D) animals

Question 5

Sexual reproduction and the close association between homologous chromosomes that occurs during meiosis probably evolved as a mechanism to repair _________ damage.

Accepted Answer

A) chromosomal 
B) mitotic 
C) cell 
D) membrane 
A) chromosomal 
B) mitotic 
C) cell 
D) membrane

Question 6

Which of the following statements regarding reduction division is false?

Accepted Answer

A) Paired homologous chromosomes segregate to different nuclei thus reducing the chromosome number by one half. 
B) Reduction division occurs refers to both meiosis I and II. 
C) It occurs with an absence of centromere division. 
D) The daughter nuclei each have one-half as many centromeres as the parental nucleus. 
A) Paired homologous chromosomes segregate to different nuclei thus reducing the chromosome number by one half. 
B) Reduction division occurs refers to both meiosis I and II. 
C) It occurs with an absence of centromere division. 
D) The daughter nuclei each have one-half as many centromeres as the parental nucleus.

Question 7

If you came across a life form that had a life cycle involving haploid cells (n),gametes (n),and a zygote (2n),you would most likely be looking at

Accepted Answer

A) an algae. 
B) a fungus. 
C) an animal. 
D) a plant. 
A) an algae. 
B) a fungus. 
C) an animal. 
D) a plant.

Question 8

Unlike meiosis I,there is no doubling of ______ before the start of meiosis II.

Accepted Answer

A) zygotes 
B) chiasma 
C) DNA 
D) cells 
A) zygotes 
B) chiasma 
C) DNA 
D) cells

Question 9

Which of the following is an explanation for independent assortment,a factor in producing genetic variability?

Accepted Answer

A) In anaphase I,where how one pair separates does not affect how any other pair separates. 
B) Chromosomes are divided into daughter cells in a random fashion. 
C) In prophase I,which chromosomes pairs with which other one is completely random. 
D) Each chromosome is capable of a different function. 
E) Chromosomes can have different functions in various types of cells of the same organism. 
A) In anaphase I,where how one pair separates does not affect how any other pair separates. 
B) Chromosomes are divided into daughter cells in a random fashion. 
C) In prophase I,which chromosomes pairs with which other one is completely random. 
D) Each chromosome is capable of a different function. 
E) Chromosomes can have different functions in various types of cells of the same organism.

Question 10

P.J.van Beneden proposed that an egg and a sperm,each containing half the complement of chromosomes found in somatic cells,fuse to produce a single cell called a(n)_______.

Accepted Answer

A) zygote 
B) karyotype 
C) embryo 
D) oocyte 
A) zygote 
B) karyotype 
C) embryo 
D) oocyte

Question 11

Diploid organisms use meiosis for the development of gametes.Meiosis consists of how many rounds of nuclear division?

Accepted Answer

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

Question 12

Which of the following statements about crossing over is false?

Accepted Answer

A) Crossing over takes place between non-sister chromatids. 
B) Crossing over takes place between sister chromatids. 
C) Recombination nodules may be observed. 
D) Sites of crossing over are called chiasmata. 
A) Crossing over takes place between non-sister chromatids. 
B) Crossing over takes place between sister chromatids. 
C) Recombination nodules may be observed. 
D) Sites of crossing over are called chiasmata.

Question 13

One of a pair of chromosomes with similar genetic information and from different sources like the sperm and egg.

Accepted Answer

A) chiasma 
B) homologue 
C) kinetochore 
D) synapsis 
E) synaptonemal 
A) chiasma 
B) homologue 
C) kinetochore 
D) synapsis 
E) synaptonemal

Question 14

If there was a single crossing over event between the second and third chromosomes from the top,the resulting chromosomes (in order)would be

Accepted Answer

A) A B C D E F G;A B C D E F G;a b c d e f g;a b c d e f g. 
B) A B C D E F G;A B c d e f g;A B C D E F G;A B c d e f g. 
C) A B C D E F G;A B c d e f g;a b C D E F G;a b c d e f g. 
D) A B C D E F G;A B c d e F G;a b C D E f g;a b c d e f g. 
A) A B C D E F G;A B C D E F G;a b c d e f g;a b c d e f g. 
B) A B C D E F G;A B c d e f g;A B C D E F G;A B c d e f g. 
C) A B C D E F G;A B c d e f g;a b C D E F G;a b c d e f g. 
D) A B C D E F G;A B c d e F G;a b C D E f g;a b c d e f g.

Question 15

At the end of telophase II of meiosis,each of the four resulting cells contains

Accepted Answer

A) one full set of chromosomes,each with two chromatids. 
B) two full sets of chromosomes,each with two chromatids. 
C) one full set of chromosomes,each a single chromatid. 
D) two full sets of chromosomes,each a single chromatiD. 
E) a different number of chromosomes. 
A) one full set of chromosomes,each with two chromatids. 
B) two full sets of chromosomes,each with two chromatids. 
C) one full set of chromosomes,each a single chromatid. 
D) two full sets of chromosomes,each a single chromatiD. 
E) a different number of chromosomes.

Question 16

_______ is a process of nuclear division in which the number of chromosomes in certain cells is halved during gamete formation.

Accepted Answer

A) Mitosis 
B) Meiosis 
C) Spermatogenesis 
D) Glycolysis 
A) Mitosis 
B) Meiosis 
C) Spermatogenesis 
D) Glycolysis

Question 17

Meiosis and mitosis are both processes that involve nuclear division.What is the difference between the two?

Accepted Answer

A) Mitosis is nuclear division,which ultimately leads to haploid gametes.Meiosis is nuclear division,which ultimately leads to diploid somatic cells. 
B) Mitosis is nuclear division,which ultimately leads to diploid somatic cells.Meiosis is nuclear division,which ultimately leads to haploid gametes. 
C) Mitosis is nuclear division,which ultimately leads to diploid gametes.Meiosis is nuclear division,which ultimately leads to haploid somatic cells. 
D) Mitosis is nuclear division,which ultimately leads to syngamy.Meiosis is nuclear division,which ultimately leads to zygotes. 
A) Mitosis is nuclear division,which ultimately leads to haploid gametes.Meiosis is nuclear division,which ultimately leads to diploid somatic cells. 
B) Mitosis is nuclear division,which ultimately leads to diploid somatic cells.Meiosis is nuclear division,which ultimately leads to haploid gametes. 
C) Mitosis is nuclear division,which ultimately leads to diploid gametes.Meiosis is nuclear division,which ultimately leads to haploid somatic cells. 
D) Mitosis is nuclear division,which ultimately leads to syngamy.Meiosis is nuclear division,which ultimately leads to zygotes.

Question 18

All of the following are processes that promote new genetic combinations except

Accepted Answer

A) crossing over. 
B) random fertilization. 
C) independent assortment. 
D) mitosis. 
E) natural selection. 
A) crossing over. 
B) random fertilization. 
C) independent assortment. 
D) mitosis. 
E) natural selection.

Question 19

Sexual reproduction increases genetic variability through all of the following except

Accepted Answer

A) crossing over in prophase I of meiosis. 
B) independent assortment in meiosis. 
C) fertilization. 
D) mitosis. 
A) crossing over in prophase I of meiosis. 
B) independent assortment in meiosis. 
C) fertilization. 
D) mitosis.

Question 20

After fertilization,the resulting zygote develops by which of the following processes?

Accepted Answer

A) mitosis 
B) meiosis 
C) syngamy 
D) synapsis 
E) reduction division 
A) mitosis 
B) meiosis 
C) syngamy 
D) synapsis 
E) reduction division

Exam 11: Sexual Reproduction and Meiosis

During anaphase I,which of the following pairs will move to opposite poles? (For purposes of this question,assume that there were no crossing over events. )

You are studying meiosis in an organism that has 28 chromosomes as its diploid number.How many chromosomes will the cell have after meiosis II,but before cytokinesis?

In animals,the cells that will eventually undergo meiosis to produce gametes are set aside early in the development.These are

The four haploid cells resulting from meiosis may further divide by mitosis in all of the following organisms except?

Sexual reproduction and the close association between homologous chromosomes that occurs during meiosis probably evolved as a mechanism to repair _________ damage.

Which of the following statements regarding reduction division is false?

If you came across a life form that had a life cycle involving haploid cells (n),gametes (n),and a zygote (2n),you would most likely be looking at

Unlike meiosis I,there is no doubling of ______ before the start of meiosis II.

Which of the following is an explanation for independent assortment,a factor in producing genetic variability?

P.J.van Beneden proposed that an egg and a sperm,each containing half the complement of chromosomes found in somatic cells,fuse to produce a single cell called a(n)_______.

Diploid organisms use meiosis for the development of gametes.Meiosis consists of how many rounds of nuclear division?

Which of the following statements about crossing over is false?

One of a pair of chromosomes with similar genetic information and from different sources like the sperm and egg.

If there was a single crossing over event between the second and third chromosomes from the top,the resulting chromosomes (in order)would be

At the end of telophase II of meiosis,each of the four resulting cells contains

_______ is a process of nuclear division in which the number of chromosomes in certain cells is halved during gamete formation.

Meiosis and mitosis are both processes that involve nuclear division.What is the difference between the two?

All of the following are processes that promote new genetic combinations except

Sexual reproduction increases genetic variability through all of the following except

After fertilization,the resulting zygote develops by which of the following processes?

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