Question 1

T and B cells are so named for the types of antigens they attack.

Accepted Answer

A) True 
 B)False

Question 2

Retention of the full genomic structure during cell differentiation is termed DNA constancy.

Accepted Answer

A) True 
 B)False

Question 3

Mutations like bithorax,in which a second pair of wings develops in the place of halteres,give clues to the evolutionary origin of differentiated structures.What inferences might you draw from bithorax,or antennapedia?

Accepted Answer

These otherwise different stru

Question 4

Your body is likely to have existing antibodies that will counter antigens you have yet to contact.How is this accomplished?

Accepted Answer

Differential splicing of numerous gene e

Question 5

The central function of X-inactivation is

Accepted Answer

A) silencing imprinted genes. 
B) enhancing the expression of genes on the chromosome left active. 
C) dosage compensation. 
D) silencing deleterious alleles. 
E) None of these 
A) silencing imprinted genes. 
B) enhancing the expression of genes on the chromosome left active. 
C) dosage compensation. 
D) silencing deleterious alleles. 
E) None of these

Question 6

In Drosophila,sex determination is carried out by

Accepted Answer

A) a cascade of alternative splicing. 
B) the SRY gene. 
C) histone modification. 
D) the DMRT1 gene. 
E) All of these 
A) a cascade of alternative splicing. 
B) the SRY gene. 
C) histone modification. 
D) the DMRT1 gene. 
E) All of these

Question 7

The cells of triploid animals,like certain salamanders,are individually larger,yet their overall body size is no different from that of diploids.Pose a developmental hypothesis for the control of morphogenesis in such animals.

Accepted Answer

The increase in cell size with no concom

Question 8

In the snail Limnaea peregra, shell coiling is determined by the nuclear alleles S (dextral) and s (sinistral). This gene is a maternal effect gene that influences egg formation, which in turn influences whether the snail that hatches from the egg has a shell that coils to the right (dextral) or left (sinistral). A female sinistral snail is mated with a sinistral male snail. The genotypes of both are unknown. All the F1 progeny are dextral. When the members of the F1 generation are crossed, they yield an F2 generation that is S1U1P13S1S1P0/S1U1B14S1U1B0 dextral and S1U1P11S1S1P0/S1U1B14S1U1B0 sinistral.
-What were the genotypes of the sinistral snails?

Accepted Answer

A) ss female and Ss male 
B) Ss female and Ss male 
C) SS female and ss male 
D) Ss female and ss male 
E) ss female and SS male 
A) ss female and Ss male 
B) Ss female and Ss male 
C) SS female and ss male 
D) Ss female and ss male 
E) ss female and SS male

Question 9

The ________ is a conserved 180-bp sequence found in homeotic genes.

Accepted Answer

A) TATA box 
B) bicoid box 
C) Hox box 
D) homeobox 
E) Pribnow box 
A) TATA box 
B) bicoid box 
C) Hox box 
D) homeobox 
E) Pribnow box

Question 10

________ is the process of cell or tissue change in development.

Accepted Answer

A) Transformation 
B) Morphogenesis 
C) Development 
D) Change 
E) None of these 
A) Transformation 
B) Morphogenesis 
C) Development 
D) Change 
E) None of these

Question 11

Antibodies elicit the production of antigens.

Accepted Answer

A) True 
 B)False

Question 12

SRY is

Accepted Answer

A) a single-region Y gene. 
B) a Y-inactivation center gene. 
C) the sex-determining region of the Y chromosome. 
D) a Y-controlling element. 
E) None of these 
A) a single-region Y gene. 
B) a Y-inactivation center gene. 
C) the sex-determining region of the Y chromosome. 
D) a Y-controlling element. 
E) None of these

Question 13

The X-inactive specific transcripts gene is designated

Accepted Answer

A) SRY. 
B) XIC. 
C) Xce. 
D) MATa. 
E) Xist. 
A) SRY. 
B) XIC. 
C) Xce. 
D) MATa. 
E) Xist.

Question 14

The best model organism for studying cell fate from fertilized egg through adult is

Accepted Answer

A) Arabidopsis thaliana. 
B) Caenorhabditis elegans. 
C) Drosophila melanogaster. 
D) Mus musculus. 
E) Saccharomyces cerevisiae. 
A) Arabidopsis thaliana. 
B) Caenorhabditis elegans. 
C) Drosophila melanogaster. 
D) Mus musculus. 
E) Saccharomyces cerevisiae.

Question 15

If cell and tissue differentiation is controlled genetically,how can environmental factors play a role in determining the final phenotype?

Accepted Answer

Environmental factors may infl

Question 16

Development occurs through the activation and inactivation of a series of specific genes in a precise sequence.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following correctly expresses the order of development?

Accepted Answer

A) Fertilization,development,maturity 
B) Induction,determination,differentiation 
C) Induction,differentiation,determination 
D) Fertilization,differentiation,determination 
E) None of these 
A) Fertilization,development,maturity 
B) Induction,determination,differentiation 
C) Induction,differentiation,determination 
D) Fertilization,differentiation,determination 
E) None of these

Question 18

Cloned animals are typically not entirely genetically identical to their cloned parent.Why?

Accepted Answer

Cloned animals are usually made by trans

Question 19

Homeobox genes

Accepted Answer

A) encode proteins with a conserved sequence of amino acids. 
B) are important in development. 
C) are conserved in multicellular animals. 
D) are transcription factors. 
E) All of these 
A) encode proteins with a conserved sequence of amino acids. 
B) are important in development. 
C) are conserved in multicellular animals. 
D) are transcription factors. 
E) All of these

Question 20

The developmental fate of a cell is established by the process termed

Accepted Answer

A) development. 
B) differentiation. 
C) determination. 
D) specialization. 
E) A,B,and C only 
A) development. 
B) differentiation. 
C) determination. 
D) specialization. 
E) A,B,and C only

Exam 19: Genetic Analysis of Development

T and B cells are so named for the types of antigens they attack.

Retention of the full genomic structure during cell differentiation is termed DNA constancy.

Mutations like bithorax,in which a second pair of wings develops in the place of halteres,give clues to the evolutionary origin of differentiated structures.What inferences might you draw from bithorax,or antennapedia?

Your body is likely to have existing antibodies that will counter antigens you have yet to contact.How is this accomplished?

The central function of X-inactivation is

In Drosophila,sex determination is carried out by

The cells of triploid animals,like certain salamanders,are individually larger,yet their overall body size is no different from that of diploids.Pose a developmental hypothesis for the control of morphogenesis in such animals.

The ________ is a conserved 180-bp sequence found in homeotic genes.

________ is the process of cell or tissue change in development.

Antibodies elicit the production of antigens.

SRY is

The X-inactive specific transcripts gene is designated

The best model organism for studying cell fate from fertilized egg through adult is

If cell and tissue differentiation is controlled genetically,how can environmental factors play a role in determining the final phenotype?

Development occurs through the activation and inactivation of a series of specific genes in a precise sequence.

Which of the following correctly expresses the order of development?

Cloned animals are typically not entirely genetically identical to their cloned parent.Why?

Homeobox genes

The developmental fate of a cell is established by the process termed

Genetics: An Introduction

DNA: The Genetic Material

DNA Replication

Gene Function

Gene Expression: Transcription

Gene Expression: Translation

Dna Mutation, DNA Repair, and Transposable Elements

Genomics: The Mapping and Sequencing of Genomes

Functional and Comparative Genomics

Recombinant DNA Technology

Mendelian Genetics

Chromosomal Basis of Inheritance

Extensions of and Deviations From Mendelian Genetic Principles

Genetic Mapping in Eukaryotes

Genetics of Bacteria and Bacteriophages

Variations in Chromosome Structure and Number

Regulation of Gene Expression in Bacteria and Bacteriophages

Regulation of Gene Expression in Eukaryotes

Genetics of Cancer

Population Genetics

Quantitative Genetics

Molecular Evolution

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