Question 1

Which of these segmentation genes is a transcription factor that defines parasegment boundaries?

Accepted Answer

A)  Frizzled 
B)  Hedgehog 
C)  Patched 
D)  Engrailed 
A)  Frizzled 
B)  Hedgehog 
C)  Patched 
D)  Engrailed D

Question 2

Which of the options given is not true of the Drosophila mesoderm?

Accepted Answer

A)  It gives rise to muscle and connective tissue. 
B)  Gastrulation internalizes the mesoderm. 
C)  The mesoderm is a primary germ layer. 
D)  The dorsal surface of the blastoderm gives rise to mesoderm. 
A)  It gives rise to muscle and connective tissue. 
B)  Gastrulation internalizes the mesoderm. 
C)  The mesoderm is a primary germ layer. 
D)  The dorsal surface of the blastoderm gives rise to mesoderm. D

Question 3

What class of patterning genes encodes members of intercellular signaling pathways?

Accepted Answer

A)  Pair-rule genes 
B)  Segmentation genes 
C)  Gap genes 
D)  Hox genes 
A)  Pair-rule genes 
B)  Segmentation genes 
C)  Gap genes 
D)  Hox genes B

Question 4

Which of the options given is not true of the Drosophila Dorsal protein?

Accepted Answer

A)  Control regions of target genes differ in their affinity for the Dorsal protein. 
B)  The dorsal region of the Drosophila embryo expresses genes that are repressed by the Dorsal protein. 
C)  The gradient of Dorsal protein divides the Drosophila embryo up into at least four well-defined domains. 
D)  Dorsal protein levels are higher within the dorsal region of the Drosophila embryo. 
A)  Control regions of target genes differ in their affinity for the Dorsal protein. 
B)  The dorsal region of the Drosophila embryo expresses genes that are repressed by the Dorsal protein. 
C)  The gradient of Dorsal protein divides the Drosophila embryo up into at least four well-defined domains. 
D)  Dorsal protein levels are higher within the dorsal region of the Drosophila embryo.

Question 5

Which term is not associated with a Drosophila larva?

Accepted Answer

A)  Instar 
B)  Metamorphosis 
C)  Denticles 
D)  Imaginal discs 
A)  Instar 
B)  Metamorphosis 
C)  Denticles 
D)  Imaginal discs

Question 6

What type of gene, such as a Hox gene, is sufficient to cause cells to adopt a particular fate?

Accepted Answer

A)  Selector 
B)  Repressor 
C)  Activator 
D)  Recessive 
A)  Selector 
B)  Repressor 
C)  Activator 
D)  Recessive

Question 7

What is the term that describes the relation between the order of the Hox genes along the chromosome and the order of their expression along the antero-posterior axis?

Accepted Answer

A)  Homeosis 
B)  Posterior dominance 
C)  Gene cluster 
D)  Co-linearity 
A)  Homeosis 
B)  Posterior dominance 
C)  Gene cluster 
D)  Co-linearity

Question 8

What class of patterning genes are expressed within seven transverse stripes in the Drosophila embryo?

Accepted Answer

A)  Pair-rule genes 
B)  Segmentation genes 
C)  Gap genes 
D)  Hox genes 
A)  Pair-rule genes 
B)  Segmentation genes 
C)  Gap genes 
D)  Hox genes

Question 9

What is the maternal anterior morphogen that controls head and thorax development?

Accepted Answer

A)  Bicoid 
B)  Nanos 
C)  Caudal 
D)  Torso 
A)  Bicoid 
B)  Nanos 
C)  Caudal 
D)  Torso

Question 10

What is the result of the first 12 nuclear divisions of a Drosophila embryo where roughly 6,000 nuclei share a single cytoplasm?

Accepted Answer

A)  Micropyle 
B)  Cellular blastoderm 
C)  Syncytium 
D)  Pole cell 
A)  Micropyle 
B)  Cellular blastoderm 
C)  Syncytium 
D)  Pole cell

Which of these segmentation genes is a transcription factor that defines parasegment boundaries?

Which of the options given is not true of the Drosophila mesoderm?

What class of patterning genes encodes members of intercellular signaling pathways?

Which of the options given is not true of the Drosophila Dorsal protein?

Which term is not associated with a Drosophila larva?

What type of gene, such as a Hox gene, is sufficient to cause cells to adopt a particular fate?

What is the term that describes the relation between the order of the Hox genes along the chromosome and the order of their expression along the antero-posterior axis?

What class of patterning genes are expressed within seven transverse stripes in the Drosophila embryo?

What is the maternal anterior morphogen that controls head and thorax development?

What is the result of the first 12 nuclear divisions of a Drosophila embryo where roughly 6,000 nuclei share a single cytoplasm?

History and Basic Concepts

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

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

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 2: Drosophila Life Cycle and Development of the Body Plan

Which of these segmentation genes is a transcription factor that defines parasegment boundaries?

Which of the options given is not true of the Drosophila mesoderm?

What class of patterning genes encodes members of intercellular signaling pathways?

Which of the options given is not true of the Drosophila Dorsal protein?

Which term is not associated with a Drosophila larva?

What type of gene, such as a Hox gene, is sufficient to cause cells to adopt a particular fate?

What is the term that describes the relation between the order of the Hox genes along the chromosome and the order of their expression along the antero-posterior axis?

What class of patterning genes are expressed within seven transverse stripes in the Drosophila embryo?

What is the maternal anterior morphogen that controls head and thorax development?

What is the result of the first 12 nuclear divisions of a Drosophila embryo where roughly 6,000 nuclei share a single cytoplasm?

History and Basic Concepts

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

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

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