1.Developmental Biology brings together many different areas of study within Biology.What types of questions can be asked about Development? 2.Describe a technique that would allow a developmental biologist to visualize the expression of developmental genes in space and time. Be sure to describe how it works in as much information as you can remember or give an example. 3.Describe (briefly) ONE historical experiment provided by Hans Driesch which refuted the most accepted cell specification mechanism of the time period (1800s). 4.In developmental biology researchers often want to ‘drive’ gene expression within developing tissues – sometimes expressing genes in different locations or at different times of development so as to demonstrate the gene’s role during normal development. What research tools could you use to ‘drive’ gene expression of Your Gene of Interest (YGI)? Explain. 5.What does it mean to be genetically equivalent? Describe how cloning demonstrates this? 6.Experiments with Xenopus (frog) in the late 1950s demonstrated that cells within the 3 germ layers had an affinity for each other and thus indicated that they had differentiated enough to be “biased” toward a specific cell layer (endoderm, mesoderm, ectoderm). Describe an experiment that demonstrated how the 3 different layers of the gastrula have an affinity for each other. 7.Morphogenesis involves the orchestration of Cell Affinity, Cell Adhesion, and Cell Migration. How do the adhesive molecules play a role as cells of the embryo change their affinity for one another? please help... Solution 1.How biological discoveries and their applications can be shaped by social prejudices of the time. About The significance and conceptual value of a particular discovery. What are theories involved in the development and what are the controversies regarding these theories. Studies of persistence of unicellular stages in life histories and studies of divergence in durations of cell cycles. How the evolution of development and dispersal differ in terrestrial and marine environments. How organisms survive and reproduce in their environments Regarding genetic heterogeneity within and among cells,Methods of studying gene action in development,Genetic diversity in different organisms . How reproduction takes place? How does the fertilized egg give rise to the adult body,and how does that adult body produce yet another body? How is the development of an organism integrated into the larger context of its habitat?.

1. 1.Developmental Biology brings together many different areas of study within Biology.What
types of questions can be asked about Development?
2.Describe a technique that would allow a developmental biologist to visualize the expression of
developmental genes in space and time. Be sure to describe how it works in as much information
as you can remember or give an example.
3.Describe (briefly) ONE historical experiment provided by Hans Driesch which refuted the
most accepted cell specification mechanism of the time period (1800s).
4.In developmental biology researchers often want to ‘drive’ gene expression within developing
tissues – sometimes expressing genes in different locations or at different times of development
so as to demonstrate the gene’s role during normal development. What research tools could you
use to ‘drive’ gene expression of Your Gene of Interest (YGI)? Explain.
5.What does it mean to be genetically equivalent? Describe how cloning demonstrates this?
6.Experiments with Xenopus (frog) in the late 1950s demonstrated that cells within the 3 germ
layers had an affinity for each other and thus indicated that they had differentiated enough to be
“biased” toward a specific cell layer (endoderm, mesoderm, ectoderm). Describe an experiment
that demonstrated how the 3 different layers of the gastrula have an affinity for each other.
7.Morphogenesis involves the orchestration of Cell Affinity, Cell Adhesion, and Cell Migration.
How do the adhesive molecules play a role as cells of the embryo change their affinity for one
another?
please help...
Solution
1.How biological discoveries and their applications can be shaped by social prejudices of the
time.
About The significance and conceptual value of a particular discovery.
What are theories involved in the development and what are the controversies regarding these
theories.
Studies of persistence of unicellular stages in life histories and studies of divergence in durations
of cell cycles.
How the evolution of development and dispersal differ in terrestrial and marine environments.
How organisms survive and reproduce in their environments
Regarding genetic heterogeneity within and among cells,Methods of studying gene action in
development,Genetic diversity in different organisms .
How reproduction takes place? How does the fertilized egg give rise to the adult body,and how

2. does that adult body produce yet another body?
How is the development of an organism integrated into the larger context of its habitat?