Embryology

14. What are the advantage/s of using zebrafish as a model organism in development

1

שאלה #182865

		A. Transparent embryos
		B. Simple genome
		C. External development
		D. All of the above
		E. A+C

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15. What are the advantage/s of using mice as a model organism in development

1

שאלה #182867

		A. Transparent embryos
		B. Model of mammalian development
		C. Accessibility of the embryo
		D. All of the above
		E. B+C

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16. Which of the following sequences correctly outlines the major stages and cellular processes involved in human fertilization?

1

שאלה #182868

		Capacitation → Acrosome reaction → Sperm-oocyte fusion → Cortical granule fusion → Zygote formation
		Sperm-oocyte fusion → Acrosome reaction → Cortical granule fusion → Capacitation → Zygote formation
		Cortical granule fusion → Capacitation → Acrosome reaction → Sperm-oocyte fusion → Zygote formation
		Acrosome reaction → Capacitation → Cortical granule fusion → Sperm-oocyte fusion → Zygote formation

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17. Which statement/s about the development of primordial germ cells (PGCs, the fetal progenitors of sperm and oocytes) are wrong?

1

שאלה #182870

		A. PGCs migrate to the gonads
		B. PGCs require BMP signaling to develop properly
		C. PGCs are formed differently in males and females
		D. PGCs are haploid cells
		E. C+D

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18. What is the primary role of polar bodies during oogenesis in humans?

1

שאלה #182871

		To fertilize the oocyte after ovulation
		To nourish the developing embryo
		To discard excess genetic material during meiosis
		To initiate implantation in the uterine wall

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20. Which of the following best describes the molecular events of the Maternal-to-Zygotic Transition (MZT) in early vertebrate development?

1

שאלה #182872

		The MZT is triggered by the fertilization-induced increase in calcium, leading directly to the transcription of maternal mRNAs and a halt in DNA replication
		The MZT is characterized by widespread activation of maternal transcription factors and global translation of stored maternal RNAs without any RNA degradation.
		The MZT involves the degradation of maternal mRNAs, activation of the zygotic genome, and regulation by small RNAs such as microRNAs
		The MZT marks the point at which maternal mitochondria begin to replicate, initiating the energetic shift required for gastrulation.
		The MZT initiates only after gastrulation, when maternal mRNAs are no longer needed and zygotic transcription is suppressed.

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22. Which of the following lists the correct sequence of major steps during in vitro fertilization (IVF) procedure?

1

שאלה #182874

		Embryo transfer → Fertilization in vitro → Oocyte retrieval → Ovarian stimulation
		Fertilization in vitro → Oocyte retrieval → Ovarian stimulation → Embryo transfer
		Ovarian stimulation → Oocyte retrieval → Fertilization in vitro → Embryo transfer
		Ovarian stimulation → Fertilization in vitro → Oocyte retrieval → Embryo transfer
		Oocyte retrieval → Ovarian stimulation → Fertilization in vitro → Embryo transfer

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23. At what stage of early mammalian development do individual blastomeres stop being pluripotent?

1

שאלה #182876

		Four-cell stage
		Compacted morula stage
		Gastrulation stage
		Neurulation stage

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24. Which molecules are NOT involved in sorting of different cell types and border refinement between different tissues during development?

1

שאלה #182878

		A. Eph-Ephrin signaling molecules
		B. Cadherins
		C. Wnt signaling molecules
		D. MyoD
		E. A+D
		F. C+D

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25. Which is NOT involved in the second cell fate decision? **deleted question

1

שאלה #182879

		Hippo signaling pathway
		Oct4
		Gata6/4
		Cdx2

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Discuss, Learn and be Happy דיון בשאלות

14. What are the advantage/s of using zebrafish as a model organism in development

15. What are the advantage/s of using mice as a model organism in development

16. Which of the following sequences correctly outlines the major stages and cellular processes involved in human fertilization?

17. Which statement/s about the development of primordial germ cells (PGCs, the fetal progenitors of sperm and oocytes) are wrong?

18. What is the primary role of polar bodies during oogenesis in humans?

20. Which of the following best describes the molecular events of the Maternal-to-Zygotic Transition (MZT) in early vertebrate development?

22. Which of the following lists the correct sequence of major steps during in vitro fertilization (IVF) procedure?

23. At what stage of early mammalian development do individual blastomeres stop being pluripotent?

24. Which molecules are NOT involved in sorting of different cell types and border refinement between different tissues during development?

25. Which is NOT involved in the second cell fate decision? **deleted question

בקשה לשינוי התשובה / תיקון שאלה gavel

בקשה למחיקת השאלהmood_bad

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