Exam Questions | Ch4 – Laying Down The Vertebrate Body Plan: - Principles of Development 6e | Instructor Test Bank by Lewis Wolpert. DOCX document preview.
Type: multiple choice question
Title: Chapter 04 - Question 01
01) The amphibian egg is radially symmetric along the animal-vegetal axis. What “breaks” this symmetry?
a. Localization of maternal RNAs to the vegetal pole
b. Fertilization
c. Localization of maternal RNAs to the animal pole
d. Cleavage
Type: multiple choice question
Title: Chapter 04 - Question 02
02) Removing the ventral blastomeres from a four-cell amphibian embryo gives rise to an embryo lacking which tissue?
a. Notochord
b. Neural tube
c. Somites
d. Gut
Type: multiple choice question
Title: Chapter 04 - Question 03
03) What is the dorsal vegetal region that induces the Spemann-Mangold organizer in an amphibian embryo?
a. Animal cap
b. Nieuwkoop center
c. Marginal zone
d. Vegetal center
Type: multiple choice question
Title: Chapter 04 - Question 04
04) Which of the options given would not be an expected way of forcing premature onset of the mid-blastula transition?
a. Injecting extra DNA into the egg
b. Injecting extra cytoplasm into the egg
c. Forcing two sperm to enter the egg
d. Removing some cytoplasm from the egg
Type: multiple choice question
Title: Chapter 04 - Question 05
05) Which of the following does not send signals that directly induce and pattern the mesoderm?
a. Vegetal blastomeres
b. Animal blastomeres
c. Dorsal mesoderm
d. Ventral mesoderm
Type: multiple choice question
Title: Chapter 04 - Question 06
06) Which of the following is not true of the role of BMPs in mesoderm patterning?
a. Overexpression of BMPs ventralizes the embryo
b. Introduction of a dominant-negative BMP receptor ventralizes the embryo.
c. BMP function is inhibited by organizer signals
d. BMPs are signaling ligands that bind to cell-surface receptors on target cells.
Type: multiple choice question
Title: Chapter 04 - Question 07
07) Which of the following is the only structure induced If one performs the organizer transplantation experiment with a blastopore lip from a late stage gastrula?
a. Head
b. Trunk
c. Tail
d. Brain
Type: multiple choice question
Title: Chapter 04 - Question 08
08) Which of the following is not a secreted organizer protein?
a. Chordin
b. Noggin
c. Follistatin
d. BMP
Type: multiple choice question
Title: Chapter 04 - Question 09
09) Transplanting a piece of anterior mesoderm to the blastocoel of a host frog embryo will induce which of the following structures?
a. Head
b. Trunk
c. Tail
d. Spinal cord
Type: multiple choice question
Title: Chapter 04 - Question 10
10) In the zebrafish embryo, what is the equivalent of the Xenopus organizer?
a. Shield
b. Node
c. Blastopore lip
d. Plate
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Principles of Development 6e | Instructor Test Bank
By Lewis Wolpert
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