Question 1

Both embryonic stem cells and embryonic germ cells are pluripotent.

Accepted Answer

A) True 
 B)False

Question 2

Stages of Drosophila development are listed here. Which of the following choices lists these stages of Drosophila development in the correct order?
A - the three germ cell layers form
B - metamorphosis
C - the larva hatches
D - the syncytial blastoderm forms
E - the body is divided into segments
F - the pupa forms
G - the cellular blastoderm forms

Accepted Answer

A)   D,G,A,E,C,F,B
B)   G,D,E,A,C,F,B
C)   D,G,A,E,F,C,B
D)   D,G,A,E,B,C,F
E)   G,D,A,E,F,C,B

Question 3

A particular segment formed during normal Drosophila development

Accepted Answer

A)   will always form the same structures in adult flies.
B)   can form different structures, depending on positional information received by the segment during early development.
C)   is only important to early developmental stages.
D)   will express different transcription factors in different individuals.
E)   will become ectoderm, endoderm, or mesoderm.

Question 4

Davis, Weintraub, and Lasser found three genes that are involved in muscle differentiation by

Accepted Answer

A)   eliminating all the gene candidates that were expressed in both muscle and nonmuscle cells.
B)   finding all the genes that were expressed in common between two different muscle cell lines.
C)   cloning all the genes that were expressed in muscle cell lines to determine if any of these genes . could cause nonmuscle cells to differentiate into muscle cells.
D)   mutating genes expressed only in muscle cells to see if differentiation could be prevented.

Question 5

The ________________ can differentiate into stems, leaves, or flowers.

Accepted Answer

A)   suspensor
B)   shoot meristem
C)   basal region
D)   central region
E)   apical meristem E

Question 6

If an Arabidopsis plant does not express homeotic genes during flower development

Accepted Answer

A)   the plant will die.
B)   the plant will only develop to the heart stage.
C)   the plant will not develop cotyledons.
D)   the plant will develop leaves instead of flowers.
E)   the plant will develop flowers instead of leaves.

Question 7

There are no federal government funds currently available for stem cell research.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is NOT true concerning homeotic genes?

Accepted Answer

A)   They encode transcription factors.
B)   They are the only types of genes that contain a region of DNA called the homeobox.
C)   They are found in clusters called complexes.
D)   A portion of the proteins they encode can bind DNA.
E)   They activate developmental genes.

Question 9

Which of the following is NOT a characteristic of a morphogen?

Accepted Answer

A)   A morphogen will only elicit effects in areas where it is at a high enough concentration.
B)   Morphogens are distributed asymmetrically throughout the cell.
C)   Morphogens can be secreted to act on neighboring cells.
D)   Morphogens can cause cell death.
E)   None of these choices are incorrect, they are all characteristics of morphogens.

Question 10

Which of the following phrases INCORRECTLY finishes this statement? Stem cells

Accepted Answer

A)   can undergo mitosis.
B)   can differentiate into more than one type of specialized cell.
C)   vary in their potency.
D)   are only found in embryos.
E)   can sometimes only differentiate into one cell type.

Question 11

Place these genes in their temporal order of expression from earliest to latest during Drosophila development.

Accepted Answer

A)   Bicoid, Gap, Homeotic
B)   Homeotic, Gap, Bicoid
C)   Homeotic, Bicoid,Gap
D)   These genes are not expressed at different times during development. They are expressed at the same time, but in a different spatial order.
E)   Kruppel, gooseberry, even-skipped

Question 12

The majority of Drosophila embryo segments will become part of the ________ in an adult fly.

Accepted Answer

A)   abdomen
B)   thorax
C)   head
D)   head or thorax
E)   bithorax complex

Question 13

The shoot meristem is totipotent.

Accepted Answer

A) True 
 B)False

Question 14

Future kidney cells and heart cells can differentiate into their respective specialized cell types because

Accepted Answer

A)   they express a different set of genes during development.
B)   they possess different genes.
C)   they arise from different embryonic stem cells.
D)   they express different transcription factors.
E)   they express different genes and different transcription factors during development.

Question 15

In Drosophila, a mutation in a gene for a bicoid transporter gene could result in which of the following?

Accepted Answer

A)   offspring with no head
B)   offspring with no spiracles
C)   offspring with two heads and no spiracles
D)   offspring with the location of the head and spiracles reversed
E)   offspring with no head and two spiracles

Question 16

Adult stem cells are always unipotent.

Accepted Answer

A) True 
 B)False

Question 17

At least some of the cells of a mammalian heart in the final phase of development would most likely be

Accepted Answer

A)   undergoing apoptosis.
B)   dividing rapidly.
C)   expressing segmentation genes.
D)   expressing cardiac-specific transcription factors.
E)   either undergoing apoptosis or expressing cardiac-specific transcription factors.

Question 18

The bicoid gene is a homeotic gene that encodes a transcription factor.

Accepted Answer

A) True 
 B)False  False

Question 19

You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?

Accepted Answer

A)   A hunchback mutation that inhibits Hunchback production.
B)   A hunchback mutation that causes Hunchback overproduction.
C)   A maternal effect gene mutation that inhibits the production of a maternal gene product.
D)   A segmentation gene mutation that inhibits production of a segmentation gene product.
E)   A segmentation gene mutation that causes the overproduction of a segmentation gene product. A

Question 20

In your fly laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.

Accepted Answer

A)   pair-rule
B)   gap
C)   maternal effect
D)   segment-polarity
E)   gap or segment-polarity

Exam 19: Developmental Genetics

Both embryonic stem cells and embryonic germ cells are pluripotent.

Correct Answer
verified

Correct Answer
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A particular segment formed during normal Drosophila development

Correct Answer
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Davis, Weintraub, and Lasser found three genes that are involved in muscle differentiation by

Correct Answer
verified

The ________________ can differentiate into stems, leaves, or flowers.

Correct Answer
verified
E

If an Arabidopsis plant does not express homeotic genes during flower development

Correct Answer
verified

There are no federal government funds currently available for stem cell research.

Correct Answer
verified

Which of the following is NOT true concerning homeotic genes?

Correct Answer
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Which of the following is NOT a characteristic of a morphogen?

Correct Answer
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Which of the following phrases INCORRECTLY finishes this statement? Stem cells

Correct Answer
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Place these genes in their temporal order of expression from earliest to latest during Drosophila development.

Correct Answer
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The majority of Drosophila embryo segments will become part of the ________ in an adult fly.

Correct Answer
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The shoot meristem is totipotent.

Correct Answer
verified

Future kidney cells and heart cells can differentiate into their respective specialized cell types because

Correct Answer
verified

In Drosophila, a mutation in a gene for a bicoid transporter gene could result in which of the following?

Correct Answer
verified

Adult stem cells are always unipotent.

Correct Answer
verified

At least some of the cells of a mammalian heart in the final phase of development would most likely be

Correct Answer
verified

The bicoid gene is a homeotic gene that encodes a transcription factor.

Correct Answer
verified
False

You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?

Correct Answer
verified
A

In your fly laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.

Correct Answer
verified

Exam 19: Developmental Genetics

Both embryonic stem cells and embryonic germ cells are pluripotent.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A particular segment formed during normal Drosophila development

Correct AnswerverifiedShow Answer

Davis, Weintraub, and Lasser found three genes that are involved in muscle differentiation by

Correct AnswerverifiedShow Answer

The ________________ can differentiate into stems, leaves, or flowers.

Correct AnswerverifiedE

If an Arabidopsis plant does not express homeotic genes during flower development

Correct AnswerverifiedShow Answer

There are no federal government funds currently available for stem cell research.

Correct AnswerverifiedShow Answer

Which of the following is NOT true concerning homeotic genes?

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of a morphogen?

Correct AnswerverifiedShow Answer

Which of the following phrases INCORRECTLY finishes this statement? Stem cells

Correct AnswerverifiedShow Answer

Place these genes in their temporal order of expression from earliest to latest during Drosophila development.

Correct AnswerverifiedShow Answer

The majority of Drosophila embryo segments will become part of the ________ in an adult fly.

Correct AnswerverifiedShow Answer

The shoot meristem is totipotent.

Correct AnswerverifiedShow Answer

Future kidney cells and heart cells can differentiate into their respective specialized cell types because

Correct AnswerverifiedShow Answer

In Drosophila, a mutation in a gene for a bicoid transporter gene could result in which of the following?

Correct AnswerverifiedShow Answer

Adult stem cells are always unipotent.

Correct AnswerverifiedShow Answer

At least some of the cells of a mammalian heart in the final phase of development would most likely be

Correct AnswerverifiedShow Answer

The bicoid gene is a homeotic gene that encodes a transcription factor.

Correct AnswerverifiedFalse

You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?

Correct AnswerverifiedA

In your fly laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.

Correct AnswerverifiedShow Answer

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E

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False

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A

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