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Survey of Embryonic Development Quiz:

 

1. Which of these refers to a fertilized egg?

Embryo
Blastula
Zygote
Gastrula

 

2. Which of these refers to the small cells that develop from a fertilized egg?

Blastomeres
Zygotes
Blastulas
Gastrulas

 

3. To what does the term cleavage refer?

A series of cellular expansions.
A series of cellular divisions.
A series of cellular extensions.
A series of cellular specializations.

 

4. Which of these is the “hollow ball” stage?

Morula
Zygote
Blastula
Gastrula

 

5. Which of these is the stage that contains the inner cell mass (ICM)?

Morula
Zygote
Blastula
Gastrula

 

6. Which of these represents the specialization of cells that become the embryo?

Cleavage
ICM
Chorion
Amnion

 

7. Which of these refers to the stage where invagination occurs?

Morula
Zygote
Blastula
Gastrula

 

8. Which of these is the specialized membrane that surrounds an egg?

Zona pellucida
Corona radiata
Tunica albuginea
Zona reticularis

 

9. Which of these refers to the granulosa cells that surround the outermost surface of a fertilized egg?

Zona pellucida
Corona radiata
Tunica albuginea
Zona reticularis

 

10. Which of these stages occurs at the end of the cleavage pathway?

Blastomere
Blastula
Morula
Gastrula

 

11. How many membranes originate from the ICM?

1
2
3
4

 

PLACE THE STAGES IN THE CORRECT ORDER FOR QUESTIONS 12-15:

 

12. First event

Gastrula
Cleavage
Zygote
Blastula

 

13. Second event

Gastrula
Cleavage
Zygote
Blastula

 

14. Third event

Gastrula
Cleavage
Zygote
Blastula

 

15. Fourth event

Gastrula
Cleavage
Zygote
Blastula

 

NOTE: You are also responsible for visual identification of the embryological stages of development as shown on the microslide indicated in your objectives. Practical applications such as these are an inherent part of each laboratory activity and exam.