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Development and Genetic Engineering

What would happen if an undifferentiated embryo was split into two pieces?
How are Siamese twins formed?
Why is gastrulation considered the most important event in a person's life?
List three pros and three cons of genetic engineering.
Draw and define a Blastula.
Draw and define Gastrulation.
If cells were separated at any time up to the blastula stage, what would be the result? Why?
Gastrulation occurs when the hollow ball of embryonic cells begins to fold in on itself to form layers of cells.
Which of the following is not one of the layers of cells formed (endoderm; pachyderm; ectoderm; mesoderm).
The formation of ___________ layers is the point at which cells begin to be differentiate.
What are the 4 stages of embryonic development and what happens at each stage?
What occurs if an embryo in the earliest stages of development (before gastrulation) is divided in two?
What might be the result if gastrulation occurs in more than 1 place?
Does the blood of the mother and embryo ever mix? Why is this important?
Define Apoptosis.
Are cells undergoing mitosis or meiosis during cleavage?
Why can't someone with O blood receive A or B blood?