Question 1

Use the following to answer questions:
The diagram below shows experiments performed to determine whether the fates of cells are irrevocably determined. 
-If cell fate were not irrevocably determined, and skin tissue could develop into notochord tissue but not into brain tissue, a normal embryo would develop in

Accepted Answer

A)   Experiment 1 only.
B)   Experiment 2 only.
C)   Experiment 3 only.
D)   Experiments 1 and 2.
E)   Experiments 2 and 3.F) C) and D)
G) B) and D)

Question 2

Nucleic acid hybridization was used to test which of the following hypotheses about Hox genes?

Accepted Answer

A)   Hox genes are transcription factors.
B)   Hox genes were derived from duplications of a single ancestral gene.
C)   Hox genes are responsible for the identity of segments in the developing embryo.
D)   Hox genes are maternal effect genes.
E)   Hox genes encode morphogens.F) A) and B)
G) C) and D)

Question 3

Cell differentiation

Accepted Answer

A)   results from the loss of particular genes from the nucleus of the differentiated cell.
B)   results from the differential expression of genes that are responsive to environmental signals.
C)   involves the persisting totipotency of early embryonic cells in the mature organism.
D)   results from mutations in genes that control the synthesis of DNA.
E)   precedes cell determination.F) B) and E)
G) A) and E)

Question 4

Which of the following distinguishes the developmental cascade seen in Drosophila melanogaster from a signal transduction cascade?

Accepted Answer

A)   Transcription factors are involved only in the signal transduction cascade.
B)   Transcription factors are involved only in the developmental cascade.
C)   The signal transduction cascade occurs mainly within a single cell.
D)   The signal transduction cascade takes place over a much longer period of time.
E)   Protein kinases are found only in the signal transduction cascade.F) B) and D)
G) C) and D)

Question 5

The primary inducer of the vulva in C. elegans comes from the _______ cell.

Accepted Answer

A)   primary vulval precursor
B)   lens placode
C)   homeotic
D)   anchor
E)   None of the aboveF) A) and E)
G) C) and D)

Question 6

Which statement about determination is true?

Accepted Answer

A)   Differentiation precedes determination.
B)   All cells are determined after two cell divisions in most organisms.
C)   A determined cell will keep its determination no matter where it is placed in an embryo.
D)   A cell changes its appearance when it becomes determined.
E)   A differentiated cell has the same pattern of transcription as a determined cell.F) A) and B)
G) A) and C)

Question 7

Using the information in the graph below, draw a diagram showing the concentration of nanos and bicoid mRNA in a Drosophila embryo from the anterior to the posterior ends.

Accepted Answer

The answer of Using the information in the graph below,...

Question 8

Which of the following classes of pattern formation genes is responsible for organizing broad areas along the anterior-posterior axis?

Accepted Answer

A)   Maternal effect genes
B)   Gap genes
C)   Pair rule genes
D)   Segment polarity genes
E)   Hox genesF) B) and E)
G) A) and B)

Question 9

Which of the following is a technique that can be used to show genomic equivalence?

Accepted Answer

A)   RNAi
B)   Nucleic acid hybridization
C)   Induction
D)   Two-dimensional gel electrophoresis
E)   RFLP mappingF) A) and E)
G) B) and C)

Question 10

Female Drosophila that are homozygous for the bicoid maternal effect gene mutation produce larvae with no head or thorax. When cytoplasm from the anterior end of a wild-type egg is inoculated into the anterior end of a bicoid mutant egg, the treated egg develops normally. What causes the restoration of normal development in the mutant eggs?

Accepted Answer

A)   Disruption of mutant bicoid gene expression after their inoculation with wild-type egg cytoplasm
B)   Normal bicoid gene expression
C)   Expression of the nanos gene
D)   Induction of normal development by adjacent embryo cells
E)   The inoculation of normal egg cytoplasmF) C) and D)
G) None of the above

Question 11

Which of the following statements about plant development is false?

Accepted Answer

A)   Both cell division and cell expansion contribute to growth in early plant embryos.
B)   Differentiation in plant cells is irreversible.
C)   Meristems at the tips of the roots and stems consist of undifferentiated cells.
D)   Flower development in a plant involves organ identity genes.
E)   In plants, the fertilized egg is called a zygote.F) A) and D)
G) A) and B)

Question 12

Which of the following statements about cloned animals is true?

Accepted Answer

A)   Cloned pets will have the same behavioral characteristics as the original pet.
B)   Cloning has been used to preserve endangered species.
C)   Cloning has been used in conjunction with recombinant DNA technology for commercial purposes.
D)   Both a and b
E)   Both b and cF) C) and E)
G) B) and E)

Question 13

Which of the following statements about hematopoietic stem cell transplantation is false?

Accepted Answer

A)   It involves pluripotent stem cells.
B)   It uses the patient's own stem cells.
C)   It is used because some treatments against cancer also kill hematopoietic cells.
D)   It leads to the production of both red and white blood cells.
E)   All of the above are true; none is false.F) B) and E)
G) D) and E)

Question 14

Differentiated cells in the process of forming the liver of a mouse provide an example of

Accepted Answer

A)   differentiation.
B)   determination.
C)   apoptosis.
D)   induction.
E)   morphogenesis.F) A) and B)
G) All of the above

Question 15

In the first successful cloning of a sheep, cells from the ewe's udder were modified to become appropriate donor cells. In order for these udder cells to be suitable donor cells, they were

Accepted Answer

A)   arrested in the G1 phase of the cell cycle.
B)   arrested in the G2 phase of the cell cycle.
C)   supplied with extra nutrients.
D)   Both a and c
E)   Both b and cF) A) and E)
G) C) and D)

Question 16

Experiments have shown that fully differentiated cells still contain all their genes, even though they express only a small set of those genes. Which type of hybridizations have demonstrated this? How do such hybridizations work?

Accepted Answer

Hybridizations were carried out using a ...

Question 17

Describe one application for human health of multipotent stem cells and one application for human health of cloned mammals.

Accepted Answer

Hematopoietic stem cells are multipotent...

Question 18

The gene _______ encodes a transcription factor involved in the conversion of undifferentiated muscle precursor cells called _______ into muscle fibers.

Accepted Answer

The answer of The gene _______ encodes a transcription factor...

Question 19

Hox genes, as well as some other types of genes that encode transcription factors, all have a 180-base-pair sequence known as the _______, which encodes a 60-amino-acid sequence known as the _______.

Accepted Answer

homeobox; ...

Question 20

Use the following to answer questions:
The diagram below shows different patterns of expression in a Drosophila embryo. 
-A different developmental gene shows the pattern of expression in a Drosophila embryo as shown by part B in the diagram above. Based on this information, this gene most likely belongs to the _______ class of genes.

Accepted Answer

A)   gap
B)   Hox
C)   segment polarity
D)   MADS box
E)   pair ruleF) None of the above
G) A) and E)

Exam 19: Differential Gene Expression in Development

Which of the following statements about hematopoietic stem cell transplantation is false?

Correct Answer
verified

Describe one application for human health of multipotent stem cells and one application for human health of cloned mammals.

Correct Answer
verified
Hematopoietic stem cells are multipotent...
View Answer

Cell differentiation

Correct Answer
verified

Which of the following statements about plant development is false?

Correct Answer
verified

The primary inducer of the vulva in C. elegans comes from the _______ cell.

Correct Answer
verified

Correct Answer
verified

Hox genes, as well as some other types of genes that encode transcription factors, all have a 180-base-pair sequence known as the _, which encodes a 60-amino-acid sequence known as the _.

Correct Answer
verified
homeobox; ...
View Answer

Which of the following statements about cloned animals is true?

Correct Answer
verified

Correct Answer
verified

Nucleic acid hybridization was used to test which of the following hypotheses about Hox genes?

Correct Answer
verified

Which of the following distinguishes the developmental cascade seen in Drosophila melanogaster from a signal transduction cascade?

Correct Answer
verified

Differentiated cells in the process of forming the liver of a mouse provide an example of

Correct Answer
verified

In the first successful cloning of a sheep, cells from the ewe's udder were modified to become appropriate donor cells. In order for these udder cells to be suitable donor cells, they were

Correct Answer
verified

Using the information in the graph below, draw a diagram showing the concentration of nanos and bicoid mRNA in a Drosophila embryo from the anterior to the posterior ends.

Correct Answer
verified

Which of the following is a technique that can be used to show genomic equivalence?

Correct Answer
verified

Which statement about determination is true?

Correct Answer
verified

Which of the following classes of pattern formation genes is responsible for organizing broad areas along the anterior-posterior axis?

Correct Answer
verified

Correct Answer
verified

The gene _ encodes a transcription factor involved in the conversion of undifferentiated muscle precursor cells called _ into muscle fibers.

Correct Answer
verified

Experiments have shown that fully differentiated cells still contain all their genes, even though they express only a small set of those genes. Which type of hybridizations have demonstrated this? How do such hybridizations work?

Correct Answer
verified
Hybridizations were carried out using a ...
View Answer

Exam 19: Differential Gene Expression in Development

Which of the following statements about hematopoietic stem cell transplantation is false?

Correct AnswerverifiedShow Answer

Describe one application for human health of multipotent stem cells and one application for human health of cloned mammals.

Correct AnswerverifiedHematopoietic stem cells are multipotent...View AnswerShow Answer

Cell differentiation

Correct AnswerverifiedShow Answer

Which of the following statements about plant development is false?

Correct AnswerverifiedShow Answer

The primary inducer of the vulva in C. elegans comes from the _______ cell.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Hox genes, as well as some other types of genes that encode transcription factors, all have a 180-base-pair sequence known as the _______, which encodes a 60-amino-acid sequence known as the _______.

Correct Answerverifiedhomeobox; ...View AnswerShow Answer

Which of the following statements about cloned animals is true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Nucleic acid hybridization was used to test which of the following hypotheses about Hox genes?

Correct AnswerverifiedShow Answer

Which of the following distinguishes the developmental cascade seen in Drosophila melanogaster from a signal transduction cascade?

Correct AnswerverifiedShow Answer

Differentiated cells in the process of forming the liver of a mouse provide an example of

Correct AnswerverifiedShow Answer

In the first successful cloning of a sheep, cells from the ewe's udder were modified to become appropriate donor cells. In order for these udder cells to be suitable donor cells, they were

Correct AnswerverifiedShow Answer

Using the information in the graph below, draw a diagram showing the concentration of nanos and bicoid mRNA in a Drosophila embryo from the anterior to the posterior ends.

Correct AnswerverifiedShow Answer

Which of the following is a technique that can be used to show genomic equivalence?

Correct AnswerverifiedShow Answer

Which statement about determination is true?

Correct AnswerverifiedShow Answer

Which of the following classes of pattern formation genes is responsible for organizing broad areas along the anterior-posterior axis?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The gene _______ encodes a transcription factor involved in the conversion of undifferentiated muscle precursor cells called _______ into muscle fibers.

Correct AnswerverifiedShow Answer

Experiments have shown that fully differentiated cells still contain all their genes, even though they express only a small set of those genes. Which type of hybridizations have demonstrated this? How do such hybridizations work?

Correct AnswerverifiedHybridizations were carried out using a ...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified
Hematopoietic stem cells are multipotent...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Hox genes, as well as some other types of genes that encode transcription factors, all have a 180-base-pair sequence known as the _, which encodes a 60-amino-acid sequence known as the _.

Correct Answer
verified
homeobox; ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The gene _ encodes a transcription factor involved in the conversion of undifferentiated muscle precursor cells called _ into muscle fibers.

Correct Answer
verified

Correct Answer
verified
Hybridizations were carried out using a ...
View Answer