Question 1

What insight did Nettie Stevens's studies of the beetle Tenebrio molitor provide about the chromosome theory of inheritance?

Accepted Answer

A) Genes are located on chromosomes. 
B) The number of autosomal chromosomes varied between gametes. 
C) Crossing over occurs between homologous chromosomes. 
D) Sex is determined by the presence of an X or Y chromosome in the male gamete. 
E) Chromosomes assort independently into the haploid gametes. 
A) Genes are located on chromosomes. 
B) The number of autosomal chromosomes varied between gametes. 
C) Crossing over occurs between homologous chromosomes. 
D) Sex is determined by the presence of an X or Y chromosome in the male gamete. 
E) Chromosomes assort independently into the haploid gametes.

Question 2

The five substages of M phase are designed to accomplish two main goals equal partitioning of chromosomal material and cytoplasmic contents between the two cells.What are these two processes called?

Accepted Answer

karyokines

Question 3

According to Bridges's proposal,exceptional phenotypes and unusual karyotypes were the result of rare mistakes in meiosis caused by the failure of X chromosomes to separate properly in either the first or second meiotic division in females.What term is used in referring to this phenomenon?

Accepted Answer

The answer of According to Bridges's proposal,exceptional phenotypes and unusual...

Question 4

Which organelle migrates during M phase to form the two opposite poles of the dividing cell and acts as the source of the spindle fiber microtubules?

Accepted Answer

A) centromere 
B) kinetochore 
C) centrosome 
D) chiasmata 
E) chromosome 
A) centromere 
B) kinetochore 
C) centrosome 
D) chiasmata 
E) chromosome

Question 5

The gametes of the two sexes are often dramatically different in size and morphology.Both gametes have a haploid nucleus,so what do female gametes contain more of?

Accepted Answer

cytoplasm

Question 6

Bridges showed that sex determination in Drosophila meant that

Accepted Answer

A) females were XX or XXX,and males were XY or XXY. 
B) females were XX,and males were XY. 
C) females were XX,and males were XY or XO. 
D) females were XX or XXX,and males were XY or XO. 
E) females were XX or XO,and males were XY or XXY. 
A) females were XX or XXX,and males were XY or XXY. 
B) females were XX,and males were XY. 
C) females were XX,and males were XY or XO. 
D) females were XX or XXX,and males were XY or XO. 
E) females were XX or XO,and males were XY or XXY.

Question 7

If a cell begins to divide rapidly (as often seen in wound repair),what would you expect to happen to the G₁ stage?

Accepted Answer

The answer of If a cell begins to divide rapidly...

Question 8

After which stage or phase of the cell cycle does the cell divide?

Accepted Answer

A) M phase 
B) G₁ 
C) G₂ 
D) S 
E) G₀ 
A) M phase 
B) G₁ 
C) G₂ 
D) S 
E) G₀

Question 9

In meiosis II,sister chromatids separate and produce what?

Accepted Answer

four haplo

Question 10

During meiosis I,when does homologous chromosome pairing and recombination occur?

Accepted Answer

A) prophase I 
B) pro-metaphase I 
C) metaphase I 
D) anaphase I 
E) telophase I 
A) prophase I 
B) pro-metaphase I 
C) metaphase I 
D) anaphase I 
E) telophase I

Question 11

How many chromosomes are found in a human somatic cell nucleus?

Accepted Answer

The answer of How many chromosomes are found in a...

Question 12

Protein kinases help phosphorylate target proteins,but they are present in relatively constant concentrations throughout the cell cycle.Which proteins,which vary through the cell cycle,form a complex with the kinases to activate them only at specific times?

Accepted Answer

The answer of Protein kinases help phosphorylate target proteins,but they...

Question 13

What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise for accurate cell division?

Accepted Answer

Karyokinesis is the equal partitioning o

Question 14

If you mutate the cyclin-binding site on a Cdk such that Cdk cannot bind to cyclin,what effect would you expect to see?

Accepted Answer

A) Cdk will be unaffected. 
B) The cell cycle will be up-regulated,and cells will proliferate. 
C) Cdk will be inactive,so the target proteins will not be phosphorylated. 
D) Cdk will be constitutively active,so the cell cycle will be unchecked. 
E) Cdk will phosphorylate its target proteins regardless of the cell cycle. 
A) Cdk will be unaffected. 
B) The cell cycle will be up-regulated,and cells will proliferate. 
C) Cdk will be inactive,so the target proteins will not be phosphorylated. 
D) Cdk will be constitutively active,so the cell cycle will be unchecked. 
E) Cdk will phosphorylate its target proteins regardless of the cell cycle.

Question 15

The ________ varies among species (each species has its characteristic number of pairs)and is identified nonspecifically as 2n.

Accepted Answer

The answer of The ________ varies among species (each species...

Question 16

Why are chromosomes more easily visible under the microscope during metaphase as compared to prophase?

Accepted Answer

They conde

Question 17

What is the mammalian transcription factor that elicits a cascade of gene transcription and developmental events that ultimately produce male internal and external structures?

Accepted Answer

The answer of What is the mammalian transcription factor that...

Question 18

The ________ number,or n,is the number of chromosomes contained in the nuclei of gametes,the nonsomatic cells.

Accepted Answer

The answer of The ________ number,or n,is the number of...

Question 19

If a trait is X-linked recessive,who would express the trait?

Accepted Answer

A) homozygous dominant females and hemizygous recessive males 
B) heterozygous recessive females and hemizygous dominant males 
C) homozygous recessive females and hemizygous recessive males 
D) heterozygous dominant females and hemizygous dominant males 
E) the same proportions of females and males 
A) homozygous dominant females and hemizygous recessive males 
B) heterozygous recessive females and hemizygous dominant males 
C) homozygous recessive females and hemizygous recessive males 
D) heterozygous dominant females and hemizygous dominant males 
E) the same proportions of females and males

Question 20

Contact points between nonsister chromatids that mark the locations of DNA-strand exchange are called

Accepted Answer

A) synaptonemal complex. 
B) metaphase plate. 
C) chiasmata. 
D) kinetochore. 
E) centrosome. 
A) synaptonemal complex. 
B) metaphase plate. 
C) chiasmata. 
D) kinetochore. 
E) centrosome.

Exam 3: Cell Division and Chromosome Heredity

What insight did Nettie Stevens's studies of the beetle Tenebrio molitor provide about the chromosome theory of inheritance?

The five substages of M phase are designed to accomplish two main goals equal partitioning of chromosomal material and cytoplasmic contents between the two cells.What are these two processes called?

According to Bridges's proposal,exceptional phenotypes and unusual karyotypes were the result of rare mistakes in meiosis caused by the failure of X chromosomes to separate properly in either the first or second meiotic division in females.What term is used in referring to this phenomenon?

Which organelle migrates during M phase to form the two opposite poles of the dividing cell and acts as the source of the spindle fiber microtubules?

The gametes of the two sexes are often dramatically different in size and morphology.Both gametes have a haploid nucleus,so what do female gametes contain more of?

Bridges showed that sex determination in Drosophila meant that

If a cell begins to divide rapidly (as often seen in wound repair),what would you expect to happen to the G₁ stage?

After which stage or phase of the cell cycle does the cell divide?

In meiosis II,sister chromatids separate and produce what?

During meiosis I,when does homologous chromosome pairing and recombination occur?

How many chromosomes are found in a human somatic cell nucleus?

Protein kinases help phosphorylate target proteins,but they are present in relatively constant concentrations throughout the cell cycle.Which proteins,which vary through the cell cycle,form a complex with the kinases to activate them only at specific times?

What is the difference between cytokinesis and karyokinesis? Which process needs to be more precise for accurate cell division?

If you mutate the cyclin-binding site on a Cdk such that Cdk cannot bind to cyclin,what effect would you expect to see?

The ________ varies among species (each species has its characteristic number of pairs)and is identified nonspecifically as 2n.

Why are chromosomes more easily visible under the microscope during metaphase as compared to prophase?

What is the mammalian transcription factor that elicits a cascade of gene transcription and developmental events that ultimately produce male internal and external structures?

The ________ number,or n,is the number of chromosomes contained in the nuclei of gametes,the nonsomatic cells.

If a trait is X-linked recessive,who would express the trait?

Contact points between nonsister chromatids that mark the locations of DNA-strand exchange are called

The Molecular Basis of Heredity, Variation, and Evolution

Transmission Genetics

Gene Interaction

Genetic Linkage and Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophage

DNA Structure and Replication

Molecular Biology and Transcription and Rna Processing

The Molecular Biology of Translation

The Integration of Genetic Approaches: Understanding Sickle Cell Disease

Chromosome Structure

Gene Mutation, DNA Repair, and Homologous Recombination

Chromosome Aberrations and Transposition

Regulation of Gene Expression in Bacteria and Bacteriophage

Regulation of Gene Expression in Eukaryotes

Forward Genetics and Recombinant DNA Technology

Applications of Recombinant DNA Technology and Reverse Genetics

Genomics: Genetics From a Whole-Genome Perspective

Cytoplasmic Inheritance and the Evolution of Organelle Genomes

Developmental Genetics

Genetic Analysis of Quantitative Traits

Population Genetics and Evolution

Filters