Podcast
Questions and Answers
During fission, how long does it take for the zygote to complete its mitotic divisions?
During fission, how long does it take for the zygote to complete its mitotic divisions?
What happens to the number of blastomeres during the morula stage?
What happens to the number of blastomeres during the morula stage?
What is the role of the larger central blastomeres during the morula stage?
What is the role of the larger central blastomeres during the morula stage?
What happens four days after fertilisation?
What happens four days after fertilisation?
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What happens to the size of the blastomeres during the morula stage?
What happens to the size of the blastomeres during the morula stage?
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Study Notes
Fission and Zygote Development
- The zygote completes its mitotic divisions in approximately 24 to 30 hours after fertilization.
Morula Stage Dynamics
- During the morula stage, the number of cells called blastomeres increases as the zygote divides without increasing in size.
- The larger central blastomeres play a crucial role in forming the inner cell mass, which eventually develops into the embryo.
Embryo Development Timeline
- Four days after fertilization, the morula stage transitions into the blastocyst stage, wherein the embryo begins to prepare for implantation into the uterine wall.
Blastomere Size Changes
- During the morula stage, while the number of blastomeres increases, their individual size decreases due to the rapid mitotic divisions without corresponding growth.
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Description
Test your knowledge on general embryology with this quiz! Learn about fission of the zygote, mitotic divisions, blastomere, morula stage, and more. Presented by Vlad Vunvulea, MD, PhD.
