Third to Eighth Week: Gastrulation and Organogenesis
- Previous year questions on Third to Eighth Week: Gastrulation and Organogenesis for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Anatomy section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 25 live questions in Third to Eighth Week: Gastrulation and Organogenesis.
- 4 of 25 questions carry a verified exam year: 2017, 2018, 2019.
- Anatomy is worth about 17 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 6 Sept 2026.
Q1.Somites are derived from __________ mesoderm:
- AIntermediate plate
- BLateral plate
- CParaxial✓ Correct answer
- DExtraembryonic
Q2.Primitive streak develops from?
- AMesoderm
- BHypoblast
- CEpiblast✓ Correct answer
- DNeural plate
Q3.Which of the following is derived from ectoderm
- ASpleen
- BGall bladder
- CCNS✓ Correct answer
- DLung epithelium
Q4.All are neural crest derivatives except?
- ACauda equina✓ Correct answer
- BAdrenal medulla
- CMelanoblasts
- DOdontoblasts
Q5.Not Mesodermal in origin is
- ARespiratory Tract Lining✓ Correct answer
- BKidney
- CHeart
- DOccipital bone
Q6.Which of the following structures is NOT derived from mesoderm?
- ASkeletal muscles
- BCardiac muscles
- CSuprarenal medulla✓ Correct answer
- DAdrenal cortex
Q7.HOX gene is responsible for which malformation
- APolysyndactyly✓ Correct answer
- BHoloprosencephaly
- CMayer Rokitansky syndrome
- DGorlin syndrome
Q8.If there is absence of precursor cell of an organ with the subsequent non development of the organ, what is the condition is called as?
- AAgenesis✓ Correct answer
- BAplasia
- CAtresia
- DAtrophy
Q9.All of the following cells are of endodermal origin except:
- AEpithelial cells of intestine
- BOdontoblasts✓ Correct answer
- CGoblet cells
- DHepatocytes
Q10.Buccopharyngeal membrane is composed of:
- AEctoderm.
- BEndoderm.
- CMesoderm
- DBoth AB✓ Correct answer
Answer key
Q1: C. Paraxial; Q2: C. Epiblast; Q3: C. CNS; Q4: A. Cauda equina; Q5: A. Respiratory Tract Lining; Q6: C. Suprarenal medulla; Q7: A. Polysyndactyly; Q8: A. Agenesis; Q9: B. Odontoblasts; Q10: D. Both AB.
Other topics in Anatomy
- Gametogenesis
- First Two Weeks: Fertilisation to Implantation
- Placenta, Fetal Membranes and Multiple Pregnancy
- Development of Pharyngeal Arches, Bone and Muscle
- Development of the Heart, Vessels and Lungs
- Development of the Gut, Liver, Pancreas and Spleen
- Development of the Face, Palate, Eye and Ear
- Development of the Nervous System and Endocrine Glands
- Development of the Urogenital System
- The Cell, Epithelium, Glands and Connective Tissue
- Cartilage, Bone and Muscle Tissue
- Nerve Tissue and Endocrine Organs
- Microstructure of Vessels, Lymphoid Organs and Airways
- Microstructure of the Gut, Liver and Urogenital Tract
- Skin, Eye and Ear Microstructure
- Cranial Nerves
- Cranial Meninges and Venous Sinuses
- Ventricles, CSF and Subarachnoid Space
- Cerebrum
- White Matter Tracts and Internal Capsule
- Basal Ganglia and Limbic Structures
- Diencephalon
- Brainstem
- Cerebellum
- Blood Supply of the Brain
- Spinal Cord
- Skull Bones, Scalp and Face
- Cervical Fascia and Neck Triangles
- Muscles, Nerves and Vessels of the Head and Neck
- Salivary, Thyroid and Parathyroid Glands
- Oral Cavity: Tongue and Palate
- Pharynx
- Larynx
- Osteology and Articulations of the Upper Limb
- Axilla, Cubital Fossa and Related Spaces
- Breast
- Brachial Plexus and Upper Limb Nerves
- Upper Limb Musculature
- Arteries and Veins of the Upper Limb
- Chest Wall, Ribs and Intercostal Spaces
- Mediastinum
- Diaphragm
- Heart
- Lungs, Pleura and Bronchial Tree
- Anterior Abdominal Wall and Inguinal Region
- Peritoneum and the Peritoneal Cavity
- Stomach, Small and Large Intestine
- Liver, Biliary Tree, Pancreas and Spleen
- Abdominal Aorta and Visceral Arterial Supply
- Kidneys, Ureters, Bladder and Adrenal Glands
- Male and Female Genital Organs
- Pelvic Walls, Pelvic Floor and Perineum
- Lower Limb Osteology
- Hip, Knee and Ankle Joints
- Lower Limb Musculature
- Lumbosacral Nerves and Lower Limb Vessels
- Femoral Triangle, Popliteal Fossa and Foot Arches
- Vertebral Column
- Classification of Bones, Joints and Cartilage
- Muscle Types and Tendon Structure
- General Organisation of Vessels, Lymphatics and Nerves
- Skin, Fascia and Ligaments