Free General Embryology MCQs with Answers

• A. Hyoid arch
• B. Tubercuum impar
• C. Mandibular arch
• D. Hypobranchial eminence

Explanation: The posterior one-third of the tongue develops mainly from the hypobranchial eminence, which is associated with the third pharyngeal arch…

• A. 18 to 23 days post fertilization and is the second stage of craiofacial development
• B. 28 to 38 days post fertilization and is the third stage of craniofacial development
• C. 42 to 55 days post fertilization and is the fourth stage of craniofacial development
• D. 17 the day post fertilization and is the first stage of craniofacial development

Explanation: Neurulation begins around days 18 to 23 after fertilization, when the neural plate folds to form the neural tube.

• A. Chimerism
• B. Mosaicism
• C. Segregation
• D. Pseudo - dominance

Explanation: Mosaicism means two or more genetically different cell lines arising from a single zygote through a postzygotic mutation or mitotic error.

• A. Paneth cells
• B. Neurons
• C. Schwann cells
• D. Odontoblasts

Explanation: Paneth cells are specialized secretory cells of the intestinal epithelium derived from endoderm.

• A. Eyes
• B. Ears
• C. Face
• D. Brain

Explanation: The face is relatively underdeveloped at birth because the jaws and facial skeleton are small compared with the enlarged neurocranium.

• A. Maxillary process
• B. Lateral palatine process
• C. Frontonasal process
• D. All of the above

Explanation: The hard palate includes the primary palate from the frontonasal process and the secondary palate from the lateral palatine processes of…

• A. First Arch
• B. Third Arch
• C. Second Arch
• D. All of the above

Explanation: The posterior one-third of the tongue develops mainly from the third pharyngeal arch through the hypobranchial eminence.

• A. Tuberculum impar
• B. Hypobranchial eminence
• C. Lingual swellings
• D. Arytenoid swellings

Explanation: The tongue develops from the tuberculum impar, lateral lingual swellings, and hypobranchial eminence.

• A. Found and the lower lip
• B. Found on the upper lip
• C. On either side of the midline
• D. Associated with cleft lip and palate

Explanation: Paramedian pits are congenital depressions of the lower lip, located on either side of the midline and sometimes associated with cleft lip…

• A. Ectoderm
• B. Mesoderm
• C. Endoderm
• D. None of the above

Explanation: Most oral epithelial structures arise from ectoderm, especially the lining of the oral cavity and derivatives of the stomodeum.

• A. Three arteries and one vein
• B. One artery and three veins
• C. One artery and one vein
• D. Two arteries and one vein

Explanation: The normal umbilical cord contains two umbilical arteries and one umbilical vein, embedded in Wharton’s jelly.

• A. From the end of first week till the eight week
• B. from the period of ovum till the tenth week
• C. From oogenesis till the eight week
• D. From fertilization till the eight week

Explanation: The embryonic period extends from fertilization through the end of the eighth week.

• A. Hepatocytes
• B. Epithelial cells of the intestine
• C. Odontoblasts
• D. Goblet cells

Explanation: Hepatocytes, intestinal epithelium and goblet cells are endodermal derivatives.

• A. 270
• B. 250
• C. 230
• D. 206

Explanation: A neonate has approximately 270 bones, many of which later fuse to produce the adult count of 206.

• A. 1st branchial pouch
• B. 2nd branchial pouch
• C. 3rdbranchial pouch
• D. 4thbranchial pouch

Explanation: The superior parathyroid glands develop from the dorsal wing of the fourth pharyngeal pouch.

• A. I, II,IV
• B. I, II, III
• C. I, III,IV
• D. I,II,II,IV

Explanation: The tongue develops mainly from the first, third and fourth pharyngeal arches: the anterior two-thirds from the first arch, the posterior…

• A. Hypobranchial eminence
• B. Two lingual swellings
• C. Tuberculum impar
• D. B & C

Explanation: The anterior two-thirds develops chiefly from the paired lateral lingual swellings of the first arch, with contribution from the…