Question 1

What is the result of Gata6 expression within the inner cell mass?

Accepted Answer

A)  Cells differentiate into a layer of primitive endoderm 
B)  Cells differentiate into trophoblasts 
C)  Cells differentiate into epiblast 
D)  Cells revert back to a more pluripotent state 
A)  Cells differentiate into a layer of primitive endoderm 
B)  Cells differentiate into trophoblasts 
C)  Cells differentiate into epiblast 
D)  Cells revert back to a more pluripotent state A

Question 2

Which of the options given is the Nieuwkoop center analog in the chick embryo?

Accepted Answer

A)  Anterior marginal zone 
B)  Posterior marginal zone 
C)  Area pellucida 
D)  Area opaca 
A)  Anterior marginal zone 
B)  Posterior marginal zone 
C)  Area pellucida 
D)  Area opaca B

Question 3

The sclerotome region of a somite gives rise to vertebrae and ribs. From which tissues does the sclerotome receive signals to direct these fates?

Accepted Answer

A)  Lateral plate mesoderm 
B)  Notochord and floor plate 
C)  Roof plate and overlying ectoderm 
D)  Endoderm 
A)  Lateral plate mesoderm 
B)  Notochord and floor plate 
C)  Roof plate and overlying ectoderm 
D)  Endoderm B

Question 4

What is another way of referring to the paraxial mesoderm?

Accepted Answer

A)  Intermediate mesoderm 
B)  Somitic mesoderm 
C)  Lateral plate mesoderm 
D)  Notochord 
A)  Intermediate mesoderm 
B)  Somitic mesoderm 
C)  Lateral plate mesoderm 
D)  Notochord

Question 5

Which of the following is not true of the trophectoderm?

Accepted Answer

A)  Cells on the morula's periphery tend to become trophectoderm 
B)  Formation of the trophectoderm is the first differentiation event in mammalian embryonic development 
C)  The transcription factor Oct4 promotes trophectoderm formation 
D)  Mouse chimeras have been used to study trophectoderm specification 
A)  Cells on the morula's periphery tend to become trophectoderm 
B)  Formation of the trophectoderm is the first differentiation event in mammalian embryonic development 
C)  The transcription factor Oct4 promotes trophectoderm formation 
D)  Mouse chimeras have been used to study trophectoderm specification

Question 6

What is the signaling protein responsible for initiating neural tissue induction in the chick embryo?

Accepted Answer

A)  FGF 
B)  BMP 
C)  Chordin 
D)  Cerberus 
A)  FGF 
B)  BMP 
C)  Chordin 
D)  Cerberus

Question 7

What does the "clock and wavefront" model propose?

Accepted Answer

A)  Cells must undergo a specific number of oscillations of gene activity in order to form a somite 
B)  Cells must be passed by the wavefront to commit to forming a somite 
C)  Cells must not have yet been passed by the wavefront to commit to forming a somite 
D)  Genes that position a wavefront have clock-like gene expression 
A)  Cells must undergo a specific number of oscillations of gene activity in order to form a somite 
B)  Cells must be passed by the wavefront to commit to forming a somite 
C)  Cells must not have yet been passed by the wavefront to commit to forming a somite 
D)  Genes that position a wavefront have clock-like gene expression

Question 8

What determines the orientation of the antero-posterior axis in the epiblast of a chick embryo?

Accepted Answer

A)  A random process 
B)  Interaction with the surrounding albumin 
C)  Gravity effects on the embryo 
D)  It is oriented away from the site of sperm entry 
A)  A random process 
B)  Interaction with the surrounding albumin 
C)  Gravity effects on the embryo 
D)  It is oriented away from the site of sperm entry

Question 9

Which of the following genes determines the identity of somites in mouse and chick embryos and can be disrupted in order to induce transformations or antero-posterior shifts in vertebral fate?

Accepted Answer

A)  Hox 
B)  BMP 
C)  Fgf 
D)  Notch 
A)  Hox 
B)  BMP 
C)  Fgf 
D)  Notch

Question 10

Which of the following is not true of somites?

Accepted Answer

A)  Somites give rise to bone, cartilage, and muscle of the body axis 
B)  Two somites form simultaneously 
C)  Somites form rhythmically from posterior to anterior 
D)  Somites are formed from mesoderm adjacent to the neural tube 
A)  Somites give rise to bone, cartilage, and muscle of the body axis 
B)  Two somites form simultaneously 
C)  Somites form rhythmically from posterior to anterior 
D)  Somites are formed from mesoderm adjacent to the neural tube

What is the result of Gata6 expression within the inner cell mass?

Which of the options given is the Nieuwkoop center analog in the chick embryo?

The sclerotome region of a somite gives rise to vertebrae and ribs. From which tissues does the sclerotome receive signals to direct these fates?

What is another way of referring to the paraxial mesoderm?

Which of the following is not true of the trophectoderm?

What is the signaling protein responsible for initiating neural tissue induction in the chick embryo?

What does the "clock and wavefront" model propose?

What determines the orientation of the antero-posterior axis in the epiblast of a chick embryo?

Which of the following genes determines the identity of somites in mouse and chick embryos and can be disrupted in order to induce transformations or antero-posterior shifts in vertebral fate?

Which of the following is not true of somites?

History and Basic Concepts

Drosophila Life Cycle and Development of the Body Plan

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

Morphogenesis: Change in Form in the Early Embryo

Cell Differentiation Stem Cells

Germ Cells, Fertilization Sex

Organogenesis

Development of the Nervous System

Growth, Post-Embryonic Development and Regeneration

Plant Life Cycle and Development

Evolution and Development

Filters

Exam 5: Laying Down and Completing the Vertebrate Body Plan: Chick and Mouse

What is the result of Gata6 expression within the inner cell mass?

Which of the options given is the Nieuwkoop center analog in the chick embryo?

The sclerotome region of a somite gives rise to vertebrae and ribs. From which tissues does the sclerotome receive signals to direct these fates?

What is another way of referring to the paraxial mesoderm?

Which of the following is not true of the trophectoderm?

What is the signaling protein responsible for initiating neural tissue induction in the chick embryo?

What does the "clock and wavefront" model propose?

What determines the orientation of the antero-posterior axis in the epiblast of a chick embryo?

Which of the following genes determines the identity of somites in mouse and chick embryos and can be disrupted in order to induce transformations or antero-posterior shifts in vertebral fate?

Which of the following is not true of somites?

History and Basic Concepts

Drosophila Life Cycle and Development of the Body Plan

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

Morphogenesis: Change in Form in the Early Embryo

Cell Differentiation Stem Cells

Germ Cells, Fertilization Sex

Organogenesis

Development of the Nervous System

Growth, Post-Embryonic Development and Regeneration

Plant Life Cycle and Development

Evolution and Development

Filters