Question 1

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

Accepted Answer

A) chromosome replication 
B) synapsis of pairs of homologous chromosomes 
C) production of daughter cells 
D) condensation of chromatin 
A) chromosome replication 
B) synapsis of pairs of homologous chromosomes 
C) production of daughter cells 
D) condensation of chromatin

Question 2

Which of the following processes leads directly to the formation of gametes in a plant's sexual life cycle?

Accepted Answer

A) meiosis in the sporophyte 
B) mitosis in the gametophyte 
C) meiosis in the gametophyte 
D) mitosis in the sporophyte 
A) meiosis in the sporophyte 
B) mitosis in the gametophyte 
C) meiosis in the gametophyte 
D) mitosis in the sporophyte

Question 3

In a cell undergoing meiosis,if centromeres of sister chromatids become disjoined and chromatids separate,what process has occurred?.

Accepted Answer

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

Question 4

Scientists have produced a hybrid plant that was the result of the fertilization of gametes between one plant with a diploid number of 24 and another with a diploid number of 20.How many chromosomes would the diploid hybrid plant have?

Accepted Answer

A) 44 chromosomes 
B) 22 chromosomes 
C) 24 chromosomes 
D) 20 chromosomes 
A) 44 chromosomes 
B) 22 chromosomes 
C) 24 chromosomes 
D) 20 chromosomes

Question 5

Which phase of meiosis is represented in the figure above?

Accepted Answer

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

Question 6

Which of the following processes happens during meiosis I?

Accepted Answer

A) Homologous chromosomes of a pair are separated from each other. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed. 
A) Homologous chromosomes of a pair are separated from each other. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed.

Question 7

The somatic cells of a type of shrub called a privet each contain 46 chromosomes.To be as different as they are from human cells,which have the same number of chromosomes,which of the following must be true?

Accepted Answer

A) Privet cells cannot reproduce sexually. 
B) Genes of privet chromosomes are significantly different from those in humans. 
C) Privet shrubs must be metabolically more like animals than like other shrubs. 
D) Genes on a particular privet chromosome,such as the X,must be on a different human chromosome,such as number 18. 
A) Privet cells cannot reproduce sexually. 
B) Genes of privet chromosomes are significantly different from those in humans. 
C) Privet shrubs must be metabolically more like animals than like other shrubs. 
D) Genes on a particular privet chromosome,such as the X,must be on a different human chromosome,such as number 18.

Question 8

Figure 10.6
-Refer to Figure 10.6 above.Which of the progression of events listed corresponds to the series of events that occurs in the life cycle of animals?

Accepted Answer

A) zygote,mitosis,gametophyte,mitosis,fertilization,zygote,mitosis 
B) diploid multicellular organism,meiosis,fertilization,zygote,mitosis 
C) fertilization,mitosis,multicellular haploid,mitosis,spores,sporophyte 
D) gametophyte,meiosis,zygote,spores,sporophyte,zygote 
A) zygote,mitosis,gametophyte,mitosis,fertilization,zygote,mitosis 
B) diploid multicellular organism,meiosis,fertilization,zygote,mitosis 
C) fertilization,mitosis,multicellular haploid,mitosis,spores,sporophyte 
D) gametophyte,meiosis,zygote,spores,sporophyte,zygote

Question 9

Which of the following types of cells would be produced by meiosis?

Accepted Answer

A) a haploid animal cell 
B) a diploid animal cell 
C) a diploid plant cell 
D) a diploid unicellular organism 
A) a haploid animal cell 
B) a diploid animal cell 
C) a diploid plant cell 
D) a diploid unicellular organism

Question 10

-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 above.A certain female's number 12 chromosomes both have the blue gene and number 19 chromosomes both have the long gene.As cells in her ovaries undergo meiosis,her resulting eggs (ova)may have which of the following?

Accepted Answer

A) either two number 12 chromosomes with blue genes or two with orange genes 
B) either two number 19 chromosomes with long genes or two with short genes 
C) either one blue or one orange gene in addition to either one long or one short gene 
D) one chromosome 12 with one blue gene and one chromosome 19 with one long gene 
A) either two number 12 chromosomes with blue genes or two with orange genes 
B) either two number 19 chromosomes with long genes or two with short genes 
C) either one blue or one orange gene in addition to either one long or one short gene 
D) one chromosome 12 with one blue gene and one chromosome 19 with one long gene

Question 11

Which of the following statements best describes a karyotype?

Accepted Answer

A) a pictorial representation of all the genes for a species 
B) a display of all of the chromosomes of a single cell 
C) the combination of all the maternal and paternal chromosomes of a species 
D) the collection of all the chromosomes in an individual organism 
A) a pictorial representation of all the genes for a species 
B) a display of all of the chromosomes of a single cell 
C) the combination of all the maternal and paternal chromosomes of a species 
D) the collection of all the chromosomes in an individual organism

Question 12

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 homologous chromosomes at the metaphase plate
3)separation of sister chromatids
4)separation of the homologs;no uncoupling of the centromere
5)synapsis;chromosomes moving to the middle of the cell in pairs
Which of the steps take(s)place in both mitosis and meiosis?

Accepted Answer

A) 3 
B) 5 
C) 2 and 3 only 
D) 2,3,and 5 
A) 3 
B) 5 
C) 2 and 3 only 
D) 2,3,and 5

Question 13

If a horticulturist breeding plants known as gardenias succeeds in having a single plant with a particularly desirable set of traits,which of the following processes would be her most probable and efficient route to establishing a line of such plants with that particular set of traits?

Accepted Answer

A) Go back through her previous experiments to obtain another plant with the same traits. 
B) Breed this plant with another plant with much weaker traits. 
C) Clone the plant asexually to produce an identical one. 
D) Force the plant to self-pollinate to obtain an identical one. 
A) Go back through her previous experiments to obtain another plant with the same traits. 
B) Breed this plant with another plant with much weaker traits. 
C) Clone the plant asexually to produce an identical one. 
D) Force the plant to self-pollinate to obtain an identical one.

Question 14

Which of the following statements is correct regarding human X and Y chromosomes?

Accepted Answer

A) They are both present in every somatic cell of males and females alike. 
B) They are about the same size and have approximately the same number of genes. 
C) They are almost entirely homologous,despite their different names. 
D) They are responsible for the determination of an individual's sex. 
A) They are both present in every somatic cell of males and females alike. 
B) They are about the same size and have approximately the same number of genes. 
C) They are almost entirely homologous,despite their different names. 
D) They are responsible for the determination of an individual's sex.

Question 15

If the DNA content of a diploid cell in the G1 phase of the cell cycle is 24 fg (femtograms),then the DNA content of the same cell at metaphase of meiosis I would be

Accepted Answer

A) 12 fg. 
B) 6 fg. 
C) 24 fg. 
D) 48 fg. 
A) 12 fg. 
B) 6 fg. 
C) 24 fg. 
D) 48 fg.

Question 16

Which of the following structures is found in a pair of homologous chromosomes?

Accepted Answer

A) two single-stranded chromosomes that have synapsed 
B) two sister chromatids that have synapsed 
C) four sister chromatids 
D) four unique chromosomes 
A) two single-stranded chromosomes that have synapsed 
B) two sister chromatids that have synapsed 
C) four sister chromatids 
D) four unique chromosomes

Question 17

A given organism has 46 chromosomes in its karyotype.Which of the following statements is correct regarding this organism?

Accepted Answer

A) It must be human. 
B) It must be an animal. 
C) It must be sexually reproducing. 
D) Its gametes must have 23 chromosomes. 
A) It must be human. 
B) It must be an animal. 
C) It must be sexually reproducing. 
D) Its gametes must have 23 chromosomes.

Question 18

The karyotype of one species of primate has 48 chromosomes.In a particular female,cell division malfunctions,and she produces one of her eggs with an extra chromosome (25).The most probable source of this error would be a mistake in which of the following processes?

Accepted Answer

A) mitosis in her ovary 
B) telophase II of one meiotic event 
C) telophase I of one meiotic event 
D) either anaphase I or II of meiosis 
A) mitosis in her ovary 
B) telophase II of one meiotic event 
C) telophase I of one meiotic event 
D) either anaphase I or II of meiosis

Question 19

Which phase of meiosis is represented in the figure above?

Accepted Answer

A) anaphase I 
B) anaphase II 
C) prophase I 
D) telophase I 
A) anaphase I 
B) anaphase II 
C) prophase I 
D) telophase I

Exam 10: Meiosis and Sexual Life Cycles

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

Which of the following processes leads directly to the formation of gametes in a plant's sexual life cycle?

In a cell undergoing meiosis,if centromeres of sister chromatids become disjoined and chromatids separate,what process has occurred?.

Scientists have produced a hybrid plant that was the result of the fertilization of gametes between one plant with a diploid number of 24 and another with a diploid number of 20.How many chromosomes would the diploid hybrid plant have?

Which phase of meiosis is represented in the figure above?

Which of the following processes happens during meiosis I?

The somatic cells of a type of shrub called a privet each contain 46 chromosomes.To be as different as they are from human cells,which have the same number of chromosomes,which of the following must be true?

Figure 10.6 -Refer to Figure 10.6 above.Which of the progression of events listed corresponds to the series of events that occurs in the life cycle of animals?

Which of the following types of cells would be produced by meiosis?

Which of the following statements best describes a karyotype?

If a horticulturist breeding plants known as gardenias succeeds in having a single plant with a particularly desirable set of traits,which of the following processes would be her most probable and efficient route to establishing a line of such plants with that particular set of traits?

Which of the following statements is correct regarding human X and Y chromosomes?

If the DNA content of a diploid cell in the G1 phase of the cell cycle is 24 fg (femtograms),then the DNA content of the same cell at metaphase of meiosis I would be

Which of the following structures is found in a pair of homologous chromosomes?

A given organism has 46 chromosomes in its karyotype.Which of the following statements is correct regarding this organism?

The karyotype of one species of primate has 48 chromosomes.In a particular female,cell division malfunctions,and she produces one of her eggs with an extra chromosome (25).The most probable source of this error would be a mistake in which of the following processes?

Which phase of meiosis is represented in the figure above?

Introduction: Evolution and the Foundations of Biology

The Chemical Context of Life

Carbon and the Molecular Diversity of Life

A Tour of the Cell

Membrane Transport and Cell Signaling

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

The Cell Cycle

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Development,stem Cells,and Cancer

Viruses

Genomes and Their Evolution

Descent With Modification

Phylogeny

The Evolution of Populations

The Origin of Species

Broad Patterns of Evolution

Early Life and the Diversification of Prokaryotes

The Origin and Diversification of Eukaryotes

The Colonization of Land by Plants and Fungi

The Rise of Animal Diversity

Plant Structure and Growth

Resource Acquisition,nutrition,and Transport in Vascular Plants

Reproduction and Domestication of Flowering Plants

Plant Responses to Internal and External Signals

Homeostasis and Endocrine Signaling

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Reproduction and Development

Neurons,synapses,and Signaling

Nervous and Sensory Systems

Motor Mechanisms and Behavior

Population Ecology and the Distribution of Organisms

Ecological Communities

Ecosystems and Energy

Conservation Biology and Global Change

Filters

If the DNA content of a diploid cell in the G₁ phase of the cell cycle is 24 fg (femtograms),then the DNA content of the same cell at metaphase of meiosis I would be