Question 1

Which of the following happens at the conclusion of meiosis I?

Accepted Answer

A) Homologous chromosomes are separated. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed. 
E) The sperm cells elongate to form a head and a tail end. 
A) Homologous chromosomes are separated. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed. 
E) The sperm cells elongate to form a head and a tail end.

Question 2

When we see chiasmata under a microscope,that lets us know which of the following has occurred?

Accepted Answer

A) asexual reproduction 
B) meiosis II 
C) anaphase II 
D) prophase I 
E) separation of homologues 
A) asexual reproduction 
B) meiosis II 
C) anaphase II 
D) prophase I 
E) separation of homologues

Question 3

A cell divides to produce two daughter cells that are genetically different.

Accepted Answer

A) The statement is true for mitosis only. 
B) The statement is true for meiosis I only. 
C) The statement is true for meiosis II only. 
D) The statement is true for mitosis and meiosis I. 
E) The statement is true for mitosis and meiosis II. 
A) The statement is true for mitosis only. 
B) The statement is true for meiosis I only. 
C) The statement is true for meiosis II only. 
D) The statement is true for mitosis and meiosis I. 
E) The statement is true for mitosis and meiosis II.

Question 4

Which of the following can utilize both mitosis and meiosis in the correct circumstances?

Accepted Answer

A) a haploid animal cell 
B) a diploid cell from a plant stem 
C) any diploid animal cell 
D) a plant-like protist 
E) an archaea 
A) a haploid animal cell 
B) a diploid cell from a plant stem 
C) any diploid animal cell 
D) a plant-like protist 
E) an archaea

Question 5

Homologous chromosomes move toward opposite poles of a dividing cell during

Accepted Answer

A) mitosis. 
B) meiosis I. 
C) meiosis II. 
D) fertilization. 
E) binary fission. 
A) mitosis. 
B) meiosis I. 
C) meiosis II. 
D) fertilization. 
E) binary fission.

Question 6

Whether during mitosis or meiosis,sister chromatids are held together by proteins referred to as cohesins.Such molecules must have which of the following properties?

Accepted Answer

A) They must persist throughout the cell cycle. 
B) They must be removed before meiosis can begin. 
C) They must be removed before anaphase can occur. 
D) They must reattach to chromosomes during G₁. 
E) They must be intact for nuclear envelope reformation. 
A) They must persist throughout the cell cycle. 
B) They must be removed before meiosis can begin. 
C) They must be removed before anaphase can occur. 
D) They must reattach to chromosomes during G₁. 
E) They must be intact for nuclear envelope reformation.

Question 7

Which of these is a karyotype?

Accepted Answer

A) a display of all of the cell types in an organism 
B) organized images of a cell's chromosomes 
C) the appearance of an organism 
D) a display of a cell's mitotic stages 
E) a list of all of the organism's genes 
A) a display of all of the cell types in an organism 
B) organized images of a cell's chromosomes 
C) the appearance of an organism 
D) a display of a cell's mitotic stages 
E) a list of all of the organism's genes

Question 8

For the following questions,match the key event of meiosis with the stages listed below.
  
-Tetrads of chromosomes are aligned at the equator of the spindle; alignment determines independent assortment.

Accepted Answer

A) I 
B) II 
C) IV 
D) VI 
E) VIII 
A) I 
B) II 
C) IV 
D) VI 
E) VIII

Question 9

The following question refers to the essential steps in meiosis described below.
1.Formation of four new nuclei,each with half the chromosomes present in the parental nucleus
2.Alignment of tetrads at the metaphase plate
3.Separation of sister chromatids
4.Separation of the homologues; no uncoupling of the centromere
5.Synapsis; chromosomes moving to the middle of the cell in pairs
-How does the sexual life cycle increase the genetic variation in a species?

Accepted Answer

A) by allowing crossing over 
B) by allowing fertilization 
C) by increasing gene stability 
D) by conserving chromosomal gene order 
E) by decreasing mutation frequency 
A) by allowing crossing over 
B) by allowing fertilization 
C) by increasing gene stability 
D) by conserving chromosomal gene order 
E) by decreasing mutation frequency

Question 10

The generation-to-generation sequence of stages in an organism's life history is called (its)

Accepted Answer

A) alternation of generations. 
B) pedigree. 
C) F2 generation. 
D) cell cycle. 
E) life cycle. 
A) alternation of generations. 
B) pedigree. 
C) F2 generation. 
D) cell cycle. 
E) life cycle.

Question 11

Which of the following occurs in meiosis but not in mitosis?

Accepted Answer

A) chromosome replication 
B) synapsis of chromosomes 
C) production of daughter cells 
D) alignment of chromosomes at the equator 
E) condensation of chromatin 
A) chromosome replication 
B) synapsis of chromosomes 
C) production of daughter cells 
D) alignment of chromosomes at the equator 
E) condensation of chromatin

Question 12

Crossing over normally takes place during which of the following processes?

Accepted Answer

A) meiosis II 
B) meiosis I 
C) mitosis 
D) mitosis and meiosis II 
E) mitosis, meiosis I, and meiosis II 
A) meiosis II 
B) meiosis I 
C) mitosis 
D) mitosis and meiosis II 
E) mitosis, meiosis I, and meiosis II

Question 13

For the following questions,match the key event of meiosis with the stages listed below.
  
-Synaptonemal complexes form or are still present.

Accepted Answer

A) I only 
B) I and IV only 
C) I and VIII only 
D) II and VI only 
E) I, II, III, and IV only 
A) I only 
B) I and IV only 
C) I and VIII only 
D) II and VI only 
E) I, II, III, and IV only

Question 14

You have isolated DNA from cells in different stages of meiosis within one species.You have determined the relative DNA content for each type,and plotted the results on the graph shown below.Refer to the graph to answer the following questions.
  
-Imagine that there are twenty-five different species of protists living in a tide pool.Some of these species reproduce both sexually and asexually,and some of them can reproduce only asexually.The pool gradually becomes infested with disease-causing viruses and bacteria.Which species are more likely to thrive in the changing environment?

Accepted Answer

A) the sexually reproducing species 
B) the asexually reproducing species 
C) Sexually and asexually reproducing species are equally likely to thrive. 
D) the species with the higher mutation rate 
E) the species that can form multinucleated cells 
A) the sexually reproducing species 
B) the asexually reproducing species 
C) Sexually and asexually reproducing species are equally likely to thrive. 
D) the species with the higher mutation rate 
E) the species that can form multinucleated cells

Question 15

Refer to the information and figure below to answer the following question(s).
A certain (hypothetical)organism is diploid,has either blue or orange wings as the consequence of one of its genes on chromosome 12,and has either long or short antennae as the result of a second gene on chromosome 19,as shown in the figure.
  
-If a female of this species has one chromosome 12 with a blue gene and another chromosome 12 with an orange gene,and has both number 19 chromosomes with short genes,she will produce which of the following egg types?

Accepted Answer

A) only blue short gene eggs 
B) only orange short gene eggs 
C) one-half blue short and one-half orange short gene eggs 
D) three-fourths blue short and one-fourth orange short gene eggs 
E) three-fourths orange short and one-fourth blue short gene eggs 
A) only blue short gene eggs 
B) only orange short gene eggs 
C) one-half blue short and one-half orange short gene eggs 
D) three-fourths blue short and one-fourth orange short gene eggs 
E) three-fourths orange short and one-fourth blue short gene eggs

Question 16

Which of the following is true of a species that has a chromosome number of 2n = 16?

Accepted Answer

A) The species is diploid with 32 chromosomes per cell. 
B) The species has 16 sets of chromosomes per cell. 
C) Each cell has eight homologous pairs. 
D) During the S phase of the cell cycle there will be 32 separate chromosomes. 
E) A gamete from this species has four chromosomes. 
A) The species is diploid with 32 chromosomes per cell. 
B) The species has 16 sets of chromosomes per cell. 
C) Each cell has eight homologous pairs. 
D) During the S phase of the cell cycle there will be 32 separate chromosomes. 
E) A gamete from this species has four chromosomes.

Question 17

Refer to the information and figure below to answer the following question(s).
A certain (hypothetical)organism is diploid,has either blue or orange wings as the consequence of one of its genes on chromosome 12,and has either long or short antennae as the result of a second gene on chromosome 19,as shown in the figure.
  
-Somatic cells of roundworms have four individual chromosomes per cell.How many chromosomes would you expect to find in an ovum from a roundworm?

Accepted Answer

A) four 
B) two 
C) eight 
D) a diploid number 
E) one 
A) four 
B) two 
C) eight 
D) a diploid number 
E) one

Question 18

When homologous chromosomes cross over,what occurs?

Accepted Answer

A) Two chromatids get tangled, resulting in one re-sequencing its DNA. 
B) Two sister chromatids exchange identical pieces of DNA. 
C) Specific proteins break the two strands and re-join them with their homologues. 
D) Each of the four DNA strands of a tetrad is broken and the pieces are mixed. 
E) Maternal alleles are "corrected" to be like paternal alleles and vice versa. 
A) Two chromatids get tangled, resulting in one re-sequencing its DNA. 
B) Two sister chromatids exchange identical pieces of DNA. 
C) Specific proteins break the two strands and re-join them with their homologues. 
D) Each of the four DNA strands of a tetrad is broken and the pieces are mixed. 
E) Maternal alleles are "corrected" to be like paternal alleles and vice versa.

Question 19

In a human karyotype,chromosomes are arranged in 23 pairs.If we choose one of these pairs,such as pair 14,which of the following do the two chromosomes of the pair have in common?

Accepted Answer

A) length and position of the centromere only 
B) length, centromere position, and staining pattern only 
C) length, centromere position, staining pattern, and traits coded for by their genes 
D) length, centromere position, staining pattern, and DNA sequences 
E) They have nothing in common except they are X-shaped. 
A) length and position of the centromere only 
B) length, centromere position, and staining pattern only 
C) length, centromere position, staining pattern, and traits coded for by their genes 
D) length, centromere position, staining pattern, and DNA sequences 
E) They have nothing in common except they are X-shaped.

Question 20

In meiosis,when are homologous chromosomes are separated?

Accepted Answer

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

Exam 13: Meiosis and Sexual Life Cycles

Which of the following happens at the conclusion of meiosis I?

When we see chiasmata under a microscope,that lets us know which of the following has occurred?

A cell divides to produce two daughter cells that are genetically different.

Which of the following can utilize both mitosis and meiosis in the correct circumstances?

Homologous chromosomes move toward opposite poles of a dividing cell during

Whether during mitosis or meiosis,sister chromatids are held together by proteins referred to as cohesins.Such molecules must have which of the following properties?

Which of these is a karyotype?

For the following questions,match the key event of meiosis with the stages listed below. -Tetrads of chromosomes are aligned at the equator of the spindle; alignment determines independent assortment.

The generation-to-generation sequence of stages in an organism's life history is called (its)

Which of the following occurs in meiosis but not in mitosis?

Crossing over normally takes place during which of the following processes?

For the following questions,match the key event of meiosis with the stages listed below. -Synaptonemal complexes form or are still present.

Which of the following is true of a species that has a chromosome number of 2n = 16?

When homologous chromosomes cross over,what occurs?

In a human karyotype,chromosomes are arranged in 23 pairs.If we choose one of these pairs,such as pair 14,which of the following do the two chromosomes of the pair have in common?

In meiosis,when are homologous chromosomes are separated?

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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