Question 1

At __________, the fusion of two gametes produces a __________.

Accepted Answer

fertilization; zygote

Question 2

Anaphase

Accepted Answer

A)  involves the lining up of the chromosomes across the equatorial plate. 
B)  is the same in mitosis and meiosis I and II. 
C)  is initiated when the chromosomes begin to move apart. 
D)  results in an unequal distribution of chromosomes to the resulting cells. 
E)  does all of these. 
A)  involves the lining up of the chromosomes across the equatorial plate. 
B)  is the same in mitosis and meiosis I and II. 
C)  is initiated when the chromosomes begin to move apart. 
D)  results in an unequal distribution of chromosomes to the resulting cells. 
E)  does all of these. C

Question 3

Gamete formation is

Accepted Answer

A)  the result of the process of mitosis. 
B)  the pairing of homologous chromosomes. 
C)  the formation of sex cells. 
D)  the fusion of gametes. 
E)  a process that occurs only in asexually reproducing forms. 
A)  the result of the process of mitosis. 
B)  the pairing of homologous chromosomes. 
C)  the formation of sex cells. 
D)  the fusion of gametes. 
E)  a process that occurs only in asexually reproducing forms. C

Question 4

Sperm are formed from the direct maturation of

Accepted Answer

A)  sperm mother cells. 
B)  spermatids. 
C)  spermatogonial cells. 
D)  primary spermatocytes. 
E)  secondary spermatocytes. 
A)  sperm mother cells. 
B)  spermatids. 
C)  spermatogonial cells. 
D)  primary spermatocytes. 
E)  secondary spermatocytes.

Question 5

Sexual reproduction

Accepted Answer

A)  leads to uniform characteristics within a population. 
B)  results in new combinations of genetic traits. 
C)  creates genetic clones. 
D)  requires less tissue differentiation than asexual reproduction. 
E)  produces genetic clones and requires less tissue differentiation than asexual reproduction. 
A)  leads to uniform characteristics within a population. 
B)  results in new combinations of genetic traits. 
C)  creates genetic clones. 
D)  requires less tissue differentiation than asexual reproduction. 
E)  produces genetic clones and requires less tissue differentiation than asexual reproduction.

Question 6

If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be due to chromosome movements during

Accepted Answer

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

Question 7

Classification.Some of the stages of meiosis are listed below.For the following statements, select the best choice of these stages.
a.prophase I
b.metaphase II
c.anaphase I
d.anaphase II
e.telophase I
-Following this phase each individual cell is haploid.

Accepted Answer

The answer of Classification.Some of the stages of meiosis are...

Question 8

Polar bodies

Accepted Answer

A)  are dumping places for excess genetic material. 
B)  have no known biological function. 
C)  are produced by meiosis. 
D)  will serve as the gametes if something happens to the egg. 
E)  all of these are true EXCEPT "will serve as the gametes if something happens to the egg." 
A)  are dumping places for excess genetic material. 
B)  have no known biological function. 
C)  are produced by meiosis. 
D)  will serve as the gametes if something happens to the egg. 
E)  all of these are true EXCEPT "will serve as the gametes if something happens to the egg."

Question 9

If a diploid organism has a genome consisting of 4 pairs of chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes (disregarding crossing over).

Accepted Answer

A)  4 
B)  8 
C)  12 
D)  16 
E)  32 
A)  4 
B)  8 
C)  12 
D)  16 
E)  32

Question 10

MATCHING
Classification.Answer the following questions by using the five numbers below.
a.10
b.20
c.40
d.60
e.80
-How many ova (eggs) would eventually result from 20 primary oocytes?

Accepted Answer

The answer of MATCHING
Classification.Answer the following questions by using the...

Question 11

The essence of meiosis is that

Accepted Answer

A)  gametes receive one copy of each member of each pair of homologous chromosomes. 
B)  diploid gametes are formed. 
C)  each gamete receives one member of each pair of homologous chromosomes. 
D)  haploid gametes are formed. 
E)  each gamete receives one member of each pair of homologous chromosomes, and haploid gametes are formed. 
A)  gametes receive one copy of each member of each pair of homologous chromosomes. 
B)  diploid gametes are formed. 
C)  each gamete receives one member of each pair of homologous chromosomes. 
D)  haploid gametes are formed. 
E)  each gamete receives one member of each pair of homologous chromosomes, and haploid gametes are formed.

Question 12

The following questions refer to the figures above.
-Which of the letters in the above figure represents the ovaries where eggs are produced?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  more than one of these 
A)  A 
B)  B 
C)  C 
D)  D 
E)  more than one of these

Question 13

There are ____ molecules of DNA in a developing human sperm cell at the beginning of prophase I.

Accepted Answer

A)  92 
B)  23 
C)  46 
D)  half as many (as compared to somatic cells) 
E)  twice as many (as compared to mature sperm) 
A)  92 
B)  23 
C)  46 
D)  half as many (as compared to somatic cells) 
E)  twice as many (as compared to mature sperm)

Question 14

During prophase II,

Accepted Answer

A)  a new bipolar spindle forms. 
B)  crossing over occurs. 
C)  chromosomes are single-stranded. 
D)  the cell is diploid. 
E)  the nuclear envelope re-forms. 
A)  a new bipolar spindle forms. 
B)  crossing over occurs. 
C)  chromosomes are single-stranded. 
D)  the cell is diploid. 
E)  the nuclear envelope re-forms.

Question 15

In comparing mitosis and meiosis, which of the following statements is true?

Accepted Answer

A)  Meiosis I is more like mitosis than is meiosis II. 
B)  Both processes result in four cells. 
C)  Pairing of homologues occurs in both. 
D)  Chromatids are present only in mitosis. 
E)  Meiosis II resembles mitosis. 
A)  Meiosis I is more like mitosis than is meiosis II. 
B)  Both processes result in four cells. 
C)  Pairing of homologues occurs in both. 
D)  Chromatids are present only in mitosis. 
E)  Meiosis II resembles mitosis.

Question 16

Which of the following is NOT an advantage of sexual reproduction?

Accepted Answer

A)  It offers an alternative adaptation in a changing environment. 
B)  It is adaptive in coevolution situations. 
C)  Half of a parent's genome is passed on. 
D)  The genetic variation it provides may be useful in the future. 
E)  It yields offspring with novel combinations of traits. 
A)  It offers an alternative adaptation in a changing environment. 
B)  It is adaptive in coevolution situations. 
C)  Half of a parent's genome is passed on. 
D)  The genetic variation it provides may be useful in the future. 
E)  It yields offspring with novel combinations of traits.

Question 17

A diploid organism has a chromosome with 10 genes.It has a different allele for each gene on its two chromosomes.How many possible outcomes for chromosome destined for a gamete after meiosis exist?

Accepted Answer

Each gene has 2 poss

Question 18

Crossing over is one of the most important events in meiosis because

Accepted Answer

A)  it produces new combinations of alleles on chromosomes. 
B)  homologous chromosomes must be separated into different daughter cells. 
C)  the number of chromosomes allotted to each daughter cell must be halved. 
D)  homologous chromatids must be separated into different daughter cells. 
E)  all of these reasons are true. 
A)  it produces new combinations of alleles on chromosomes. 
B)  homologous chromosomes must be separated into different daughter cells. 
C)  the number of chromosomes allotted to each daughter cell must be halved. 
D)  homologous chromatids must be separated into different daughter cells. 
E)  all of these reasons are true.

Question 19

MATCHING
Classification.Answer the following questions by using the five numbers below.
a.10
b.20
c.40
d.60
e.80
-How many sperm would eventually be produced from 20 primary spermatocytes?

Accepted Answer

The answer of MATCHING
Classification.Answer the following questions by using the...

Question 20

-In this generalized illustration of gametogenesis, the four cells in the right column should be labeled

Accepted Answer

A)  sperm. 
B)  eggs. 
C)  ovum and three polar bodies. 
D)  secondary spermatocytes. 
E)  diploid. 
A)  sperm. 
B)  eggs. 
C)  ovum and three polar bodies. 
D)  secondary spermatocytes. 
E)  diploid.

Exam 12: Meiosis and Sexual Reproduction

At __________, the fusion of two gametes produces a __________.

Anaphase

Gamete formation is

Sperm are formed from the direct maturation of

Sexual reproduction

If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be due to chromosome movements during

Classification.Some of the stages of meiosis are listed below.For the following statements, select the best choice of these stages. a.prophase I b.metaphase II c.anaphase I d.anaphase II e.telophase I -Following this phase each individual cell is haploid.

Polar bodies

If a diploid organism has a genome consisting of 4 pairs of chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes (disregarding crossing over).

MATCHING Classification.Answer the following questions by using the five numbers below. a.10 b.20 c.40 d.60 e.80 -How many ova (eggs) would eventually result from 20 primary oocytes?

The essence of meiosis is that

The following questions refer to the figures above. -Which of the letters in the above figure represents the ovaries where eggs are produced?

There are ____ molecules of DNA in a developing human sperm cell at the beginning of prophase I.

During prophase II,

In comparing mitosis and meiosis, which of the following statements is true?

Which of the following is NOT an advantage of sexual reproduction?

A diploid organism has a chromosome with 10 genes.It has a different allele for each gene on its two chromosomes.How many possible outcomes for chromosome destined for a gamete after meiosis exist?

Crossing over is one of the most important events in meiosis because

MATCHING Classification.Answer the following questions by using the five numbers below. a.10 b.20 c.40 d.60 e.80 -How many sperm would eventually be produced from 20 primary spermatocytes?

-In this generalized illustration of gametogenesis, the four cells in the right column should be labeled

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Startsphotosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

How Cells Reproduce

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizing Information About Species

Lifes Origin and Early Evolution

Viruses and Prokaryotes

Protiststhe Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolutionthe Invertebrates

Animal Evolutionthe Chordates

Animal Evolutionhuman Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

At , the fusion of two gametes produces a .