Question 1

A female that is XXO has Turner Syndrome.

Accepted Answer

A) True 
 B)False

Question 2

Why are dominant X-linked traits seen in women more commonly than in men?

Accepted Answer

(1)All daughters of an affecte

Question 3

A white-eyed female fruit fly is mated to a red-eyed male.One of their progeny is a white-eyed female.What is the likely karyotype of this white-eyed offspring?

Accepted Answer

A)  XX 
B)  XXY 
C)  XO 
D)  XXX 
E)  XYY 
A)  XX 
B)  XXY 
C)  XO 
D)  XXX 
E)  XYY

Question 4

In Drosophila,the recessive allele for forked bristles is sex-linked,and the recessive allele for purple eyes is autosomal.The wild-type alleles are for straight bristles and red eyes,respectively.A female,heterozygous for both pairs of alleles,is mated with a male with forked bristles and purple eyes.What percentage of the daughters will have forked bristles and purple eyes?

Accepted Answer

A)  100% 
B)  75% 
C)  50% 
D)  25% 
E)  0% 
A)  100% 
B)  75% 
C)  50% 
D)  25% 
E)  0%

Question 5

Explain the difference between sex-linked traits,sex-limited traits,and sex-influenced traits.

Accepted Answer

Sex-linked traits are always encoded on

Question 6

Which of the following statements applies to homologous chromatids?

Accepted Answer

A)  They are attached to the same centromere. 
B)  They are genetically identical. 
C)  They segregate from each other at anaphase of mitosis. 
D)  They contain the same genes in the same order but may have different alleles of some genes. 
E)  More than one statement applies to homologous chromatids. 
A)  They are attached to the same centromere. 
B)  They are genetically identical. 
C)  They segregate from each other at anaphase of mitosis. 
D)  They contain the same genes in the same order but may have different alleles of some genes. 
E)  More than one statement applies to homologous chromatids.

Question 7

The stage of mitosis when chromosomes condense to form rod-shaped structures visible under the microscope is called

Accepted Answer

A)  interphase 
B)  prophase 
C)  metaphase 
D)  anaphase 
E)  telophase 
A)  interphase 
B)  prophase 
C)  metaphase 
D)  anaphase 
E)  telophase

Question 8

Premeiotic germ cells that divide mitotically in females are referred to as

Accepted Answer

A)  primary oocytes 
B)  secondary oocytes 
C)  ootids 
D)  oogonia 
E)  ova 
A)  primary oocytes 
B)  secondary oocytes 
C)  ootids 
D)  oogonia 
E)  ova

Question 9

A female fruit fly with singed bristles was mated with a male from a true-breeding wild-type stock with long bristles.All of the F1 females had wild-type bristles and all of the F1 males had singed bristles.If the F1 flies are intercrossed,the expected ratio of long to singed bristles in the F2 flies is

Accepted Answer

A)  1:0 in both sexes (i.e. ,males and females will all have long bristles). 
B)  3:1 in both sexes. 
C)  3:1 in females,while all the males will have singed bristles. 
D)  1:1 in females,while all the males will have singed bristles. 
E)  1:1 in both sexes. 
A)  1:0 in both sexes (i.e. ,males and females will all have long bristles). 
B)  3:1 in both sexes. 
C)  3:1 in females,while all the males will have singed bristles. 
D)  1:1 in females,while all the males will have singed bristles. 
E)  1:1 in both sexes.

Question 10

Which of the following best describes cells that are arrested in G0?

Accepted Answer

A)  embryonic 
B)  cancerous 
C)  germ line 
D)  somatic 
E)  syncytial 
A)  embryonic 
B)  cancerous 
C)  germ line 
D)  somatic 
E)  syncytial

Question 11

During the S and G2 stages of interphase,the centrosomes replicate,producing two centrosomes that remain in extremely close proximity.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is not a property of homologous chromosomes?

Accepted Answer

A)  They pair physically during prophase of meiosis I. 
B)  They exchange genes by crossing-over during meiosis. 
C)  They carry alleles for the same genes at the same chromosomal position. 
D)  They are attached to the same centromere during G2 of the cell cycle. 
E)  They segregate to opposite poles at anaphase of meiosis I. 
A)  They pair physically during prophase of meiosis I. 
B)  They exchange genes by crossing-over during meiosis. 
C)  They carry alleles for the same genes at the same chromosomal position. 
D)  They are attached to the same centromere during G2 of the cell cycle. 
E)  They segregate to opposite poles at anaphase of meiosis I.

Question 13

______________________________ occurs when chromosomes fail to separate properly during meiosis.

Accepted Answer

A)  karyogamy 
B)  synaptonemy 
C)  pachytene 
D)  crossover 
E)  nondisjunction 
A)  karyogamy 
B)  synaptonemy 
C)  pachytene 
D)  crossover 
E)  nondisjunction

Question 14

A variable feature of some chromosomes in corn is the presence or absence of knobs at particular sites.Suppose that one member of each of two pairs of chromosomes in a corn plant has a knob.If this plant is crossed with a knobless plant,what percentage of the offspring is expected to be knobless?

Accepted Answer

A)  100% 
B)  75% 
C)  50% 
D)  25% 
E)  0% 
A)  100% 
B)  75% 
C)  50% 
D)  25% 
E)  0%

Question 15

Metacentric chromosomes have a centromere located closer to one end of the chromosome.

Accepted Answer

A) True 
 B)False

Question 16

Nondisjunction can occur at either the first or second division of meiosis.XXY individuals could arise from nondisjunction at the ______ meiotic division in the _____.

Accepted Answer

A)  first;mother 
B)  second;mother 
C)  first;father 
D)  second;father 
E)  more than one of the choices could give rise to XXY individuals 
A)  first;mother 
B)  second;mother 
C)  first;father 
D)  second;father 
E)  more than one of the choices could give rise to XXY individuals

Question 17

In animal gametogenesis,a single primary spermatocyte generates ______ sperm(s),while a single primary oocyte generates ______ egg(s).

Accepted Answer

A)  1;4 
B)  1;1 
C)  4;2 
D)  4;1 
E)  4;4 
A)  1;4 
B)  1;1 
C)  4;2 
D)  4;1 
E)  4;4

Question 18

At which of the following stages of meiosis would homologous chromosomes be paired?

Accepted Answer

A)  prophase of meiosis I 
B)  prophase of meiosis II 
C)  metaphase of meiosis I 
D)  metaphase of meiosis II 
E)  both prophase of meiosis I and metaphase of meiosis I 
A)  prophase of meiosis I 
B)  prophase of meiosis II 
C)  metaphase of meiosis I 
D)  metaphase of meiosis II 
E)  both prophase of meiosis I and metaphase of meiosis I

Question 19

Cells said to be in the G0 stage

Accepted Answer

A)  have two chromatids per chromosome. 
B)  are replicating their chromosomes. 
C)  are about to enter the mitotic phase of the cell cycle. 
D)  are in an extended G1 phase and no longer cycling. 
E)  are dead. 
A)  have two chromatids per chromosome. 
B)  are replicating their chromosomes. 
C)  are about to enter the mitotic phase of the cell cycle. 
D)  are in an extended G1 phase and no longer cycling. 
E)  are dead.

Question 20

What are two important functions of meiosis?

Accepted Answer

To reduce chromosome number by half in p

A female that is XXO has Turner Syndrome.

Why are dominant X-linked traits seen in women more commonly than in men?

A white-eyed female fruit fly is mated to a red-eyed male.One of their progeny is a white-eyed female.What is the likely karyotype of this white-eyed offspring?

Explain the difference between sex-linked traits,sex-limited traits,and sex-influenced traits.

Which of the following statements applies to homologous chromatids?

The stage of mitosis when chromosomes condense to form rod-shaped structures visible under the microscope is called

Premeiotic germ cells that divide mitotically in females are referred to as

Which of the following best describes cells that are arrested in G₀?

During the S and G₂ stages of interphase,the centrosomes replicate,producing two centrosomes that remain in extremely close proximity.

Which of the following is not a property of homologous chromosomes?

______________________________ occurs when chromosomes fail to separate properly during meiosis.

A variable feature of some chromosomes in corn is the presence or absence of knobs at particular sites.Suppose that one member of each of two pairs of chromosomes in a corn plant has a knob.If this plant is crossed with a knobless plant,what percentage of the offspring is expected to be knobless?

Metacentric chromosomes have a centromere located closer to one end of the chromosome.

Nondisjunction can occur at either the first or second division of meiosis.XXY individuals could arise from nondisjunction at the __ meiotic division in the _.

In animal gametogenesis,a single primary spermatocyte generates sperm(s),while a single primary oocyte generates egg(s).

At which of the following stages of meiosis would homologous chromosomes be paired?

Cells said to be in the G₀ stage

What are two important functions of meiosis?

Mendels Principles of Heredity

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

Dna Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: the Flow of Information From Dna to Rna to Protein

Digital Analysis of Genomes

Genome Annotation

Analyzing Genomic Variation

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Exploring Synthetic Biology: Concepts, Techniques, and Applications

Filters

Exam 2: Extensions to Mendels Laws

A female that is XXO has Turner Syndrome.

Why are dominant X-linked traits seen in women more commonly than in men?

A white-eyed female fruit fly is mated to a red-eyed male.One of their progeny is a white-eyed female.What is the likely karyotype of this white-eyed offspring?

Explain the difference between sex-linked traits,sex-limited traits,and sex-influenced traits.

Which of the following statements applies to homologous chromatids?

The stage of mitosis when chromosomes condense to form rod-shaped structures visible under the microscope is called

Premeiotic germ cells that divide mitotically in females are referred to as

Which of the following best describes cells that are arrested in G0?

During the S and G2 stages of interphase,the centrosomes replicate,producing two centrosomes that remain in extremely close proximity.

Which of the following is not a property of homologous chromosomes?

______________________________ occurs when chromosomes fail to separate properly during meiosis.

A variable feature of some chromosomes in corn is the presence or absence of knobs at particular sites.Suppose that one member of each of two pairs of chromosomes in a corn plant has a knob.If this plant is crossed with a knobless plant,what percentage of the offspring is expected to be knobless?

Metacentric chromosomes have a centromere located closer to one end of the chromosome.

Nondisjunction can occur at either the first or second division of meiosis.XXY individuals could arise from nondisjunction at the ______ meiotic division in the _____.

In animal gametogenesis,a single primary spermatocyte generates ______ sperm(s),while a single primary oocyte generates ______ egg(s).

At which of the following stages of meiosis would homologous chromosomes be paired?

Cells said to be in the G0 stage

What are two important functions of meiosis?

Mendels Principles of Heredity

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

Dna Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: the Flow of Information From Dna to Rna to Protein

Digital Analysis of Genomes

Genome Annotation

Analyzing Genomic Variation

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Exploring Synthetic Biology: Concepts, Techniques, and Applications

Filters

Which of the following best describes cells that are arrested in G₀?

During the S and G₂ stages of interphase,the centrosomes replicate,producing two centrosomes that remain in extremely close proximity.

Nondisjunction can occur at either the first or second division of meiosis.XXY individuals could arise from nondisjunction at the __ meiotic division in the _.

In animal gametogenesis,a single primary spermatocyte generates sperm(s),while a single primary oocyte generates egg(s).

Cells said to be in the G₀ stage