1 What type of egg does an amphibian have What is its pattern of cleavage 2 What is 2023

2023 1 What type of egg does an amphibian have What is its pattern of cleavage 2 What is

Biology 2023 Amphibian Development


1. What type of egg does an amphibian have? What is its 

pattern of cleavage?

2. What is the gray crescent, and when do you see it in 

amphibian development? What is the normal position of 

the gray crescent with respect to the first cleavage 


3. Describe the relative changes in blastomere sizes in the animal and 

vegetal poles from the start of cleavage to the blastula stage. 

4. What changes take place during gastrulation. 

5. What is the notochord? When is the notochord first apparent? How 

are its cells distinctive from those of neighboring tissues?

6. Why does organogenesis begin with neurulation?

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