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Cleavage & Blastocyst Formation — General Embryology & Gametogenesis
Embryology Question Bank
Embryology Question Bank
Cleavage & Blastocyst Formation
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Cleavage & Blastocyst Formation MCQs: practice questions
Sample Cleavage & Blastocyst Formation multiple-choice questions from General Embryology & Gametogenesis.
What is the developmental sequence during week 1?
- A. Implantation → zygote → morula → blastocyst
- B. Zygote → cleavage → morula → blastocyst
- C. Zygote → gastrula → morula → blastocyst
- D. Morula → fertilization → zygote → blastocyst
- E. Blastocyst → zygote → morula → cleavage
What is the outer cell mass of the blastocyst called?
- A. Trophoblast
- B. Yolk sac
- C. Embryoblast
- D. Hypoblast
- E. Epiblast
Up to which stage are blastomeres totipotent?
- A. Blastocyst stage
- B. Day 14
- C. Eight-cell stage
- D. After implantation
- E. Morula stage
Which blastocyst component gives rise to the embryo?
- A. Zona pellucida
- B. Syncytiotrophoblast
- C. Embryoblast
- D. Trophoblast
- E. Cytotrophoblast
What does totipotency include?
- A. Formation of placenta only
- B. Formation of gametes only
- C. Formation of ectoderm only
- D. Formation of mesoderm only
- E. Formation of embryonic and extraembryonic tissues
What happens to the total zygotic cytoplasm during early cleavage?
What does asymmetrical cleavage mean?
What distinguishes a blastocyst from a morula?
Which blastocyst component contributes to the fetal placenta?
What is a morula?
By when does the zona pellucida degenerate?
What does the trophoblast become?
What does asynchronous cleavage mean?
What can pluripotent embryoblast cells form?
Why must the zona pellucida degenerate before implantation?
What forms the blastocyst cavity?
What happens to zygotic cytoplasm during cleavage?
Which stage is enclosed by the zona pellucida before its degeneration?
What is the potency of embryoblast cells?
Which primary developmental structure gives rise to the embryo proper?
What happens to individual blastomere size during cleavage?
Which early conceptus has a fluid-filled cavity and an inner cell mass?
What is cleavage?
Which developmental stage is characterized by formation of a fluid-filled cavity?
What are the cells produced by cleavage called?
What is the chromosome-number effect of cleavage?
What type of cleavage occurs in humans?
What is the inner cell mass of the blastocyst called?
What does holoblastic cleavage mean?
How many blastomeres typically form a morula?