Question 1

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 2

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

Accepted Answer

A) synaptonemal complexes 
B) metaphase plates 
C) chiasmata 
D) kinetochores 
E) centrosomes 
A) synaptonemal complexes 
B) metaphase plates 
C) chiasmata 
D) kinetochores 
E) centrosomes

Question 3

You discover a new species of snail, Biologica terificia, and find that its haploid number is 4 (n = 4). The somatic cells of Biologica terificia are diploid. How many chromosomes are in a somatic cell of the snail in G1 phase?

Accepted Answer

A) 4 
B) 8 
C) 16 
D) too many to count 
A) 4 
B) 8 
C) 16 
D) too many to count

Question 4

Mitosis is a process of cell division that results in __________.

Accepted Answer

A) two unique daughter cells 
B) four unique daughter cells 
C) two identical daughter cells 
D) three identical daughter cells 
E) four identical daughter cells 
A) two unique daughter cells 
B) four unique daughter cells 
C) two identical daughter cells 
D) three identical daughter cells 
E) four identical daughter cells

Question 5

Single-celled eukaryotes can survive and reproduce in both haploid and diploid forms. Yeast spend most of their life cycle and actively reproduce in which form?

Accepted Answer

The answer of Single-celled eukaryotes can survive and reproduce in...

Question 6

Certain kinds of cells (e.g., some cells in the eyes and bones)mature and differentiate into a state in which they have a specialized function but do not divide or progress through the cell cycle. These cells are "stuck" in which stage?

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 7

After which stage or phase of the cell cycle does cytokinesis occur?

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 8

During mitotic cell division, if chromosomal material is improperly divided between the two daughter cells, one cell could receive three copies of a chromosome, and the other cell could receive only one. This is likely due to a defect in which process?

Accepted Answer

A) cytokinesis 
B) karyokinesis 
C) crossing over 
D) synapsis 
E) homologous recombination 
A) cytokinesis 
B) karyokinesis 
C) crossing over 
D) synapsis 
E) homologous recombination

Question 9

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...

Question 10

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

Accepted Answer

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

Question 11

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 12

Protein kinases help phosphorylate target proteins, but they are present in relatively constant concentrations throughout the cell cycle. Which proteins, which vary during 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...

Question 13

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

Accepted Answer

karyokines

Question 14

The binding of nonsister chromatids by a synaptonemal complex draws the homologs into close contact so that what process can occur?

Accepted Answer

A) cytokinesis 
B) karyokinesis 
C) independent assortment 
D) synapsis 
E) disjunction 
A) cytokinesis 
B) karyokinesis 
C) independent assortment 
D) synapsis 
E) disjunction

Question 15

In meiosis, interphase is followed by two successive rounds of cell division, meiosis I and II. Meiosis results in four haploid daughter cells because there is no ________ between these two meiotic cell divisions.

Accepted Answer

The answer of In meiosis, interphase is followed by two...

Question 16

A dihybrid has the genotype AaBb. The diagram depicts the chromosome composition of different cells from the animal. Which of the cells could represent a mature gamete?

Accepted Answer

A) Cell G 
B) Cell H 
C) Cell K 
D) Cell M 
E) Cell P 
A) Cell G 
B) Cell H 
C) Cell K 
D) Cell M 
E) Cell P

Question 17

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

Accepted Answer

A) females homozygous for the dominant allele and males hemizygous for the recessive allele 
B) heterozygous females and males hemizygous for the dominant allele 
C) females homozygous for the recessive allele and males hemizygous for the recessive allele 
D) females homozygous for the recessive allele and males hemizygous for the dominant allele 
E) significantly more females than males 
A) females homozygous for the dominant allele and males hemizygous for the recessive allele 
B) heterozygous females and males hemizygous for the dominant allele 
C) females homozygous for the recessive allele and males hemizygous for the recessive allele 
D) females homozygous for the recessive allele and males hemizygous for the dominant allele 
E) significantly more females than males

Question 18

WT yeast (TRP+)can synthesize the amino acid tryptophan and can grow on media plates lacking tryptophan. In contrast, mutant alleles (trp-)block tryptophan synthesis and result in an inability of mutant strains to grow on media lacking tryptophan. A diploid yeast was made through the cross MATa ADE+ × MATα ade-. Meiosis was induced in the diploid strain to produce an ascus with four haploid spores, which were separated and grown on plates lacking tryptophan. How many spores are expected to grow into colonies on the plate?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 19

The accompanying figure represents a chromosome at metaphase of mitosis. How many DNA molecules are present in this chromosome?

Accepted Answer

A) one 
B) two 
C) four 
D) more than four 
E) impossible to determine 
A) one 
B) two 
C) four 
D) more than four 
E) impossible to determine

Question 20

Which of the following cells could be created from a mitotic division but would not be created during a normal meiosis?

Accepted Answer

A) Cell G 
B) Cell H 
C) Cell K 
D) Cell M 
E) Cell P 
A) Cell G 
B) Cell H 
C) Cell K 
D) Cell M 
E) Cell P

Exam 3: Cell Division and Chromosome Heredity

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

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

You discover a new species of snail, Biologica terificia, and find that its haploid number is 4 (n = 4). The somatic cells of Biologica terificia are diploid. How many chromosomes are in a somatic cell of the snail in G1 phase?

Mitosis is a process of cell division that results in __________.

Single-celled eukaryotes can survive and reproduce in both haploid and diploid forms. Yeast spend most of their life cycle and actively reproduce in which form?

Certain kinds of cells (e.g., some cells in the eyes and bones)mature and differentiate into a state in which they have a specialized function but do not divide or progress through the cell cycle. These cells are "stuck" in which stage?

After which stage or phase of the cell cycle does cytokinesis occur?

During mitotic cell division, if chromosomal material is improperly divided between the two daughter cells, one cell could receive three copies of a chromosome, and the other cell could receive only one. This is likely due to a defect in which process?

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?

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

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

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

The binding of nonsister chromatids by a synaptonemal complex draws the homologs into close contact so that what process can occur?

In meiosis, interphase is followed by two successive rounds of cell division, meiosis I and II. Meiosis results in four haploid daughter cells because there is no ________ between these two meiotic cell divisions.

A dihybrid has the genotype AaBb. The diagram depicts the chromosome composition of different cells from the animal. Which of the cells could represent a mature gamete?

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

The accompanying figure represents a chromosome at metaphase of mitosis. How many DNA molecules are present in this chromosome?

Which of the following cells could be created from a mitotic division but would not be created during a normal meiosis?

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 Bacteriophages

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 Bacteriophages

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

You discover a new species of snail, Biologica terificia, and find that its haploid number is 4 (n = 4). The somatic cells of Biologica terificia are diploid. How many chromosomes are in a somatic cell of the snail in G₁ phase?