1. Which statement about blastocyst is incorrect?
A) It has inner cell mass and trophoblast
B) Formed after morula stage
C) Implantation occurs at this stage
D) It lacks fluid filled cavity
2. Gastrulation leads to formation of:
A) Three germ layers
B) Neurulation
C) Limb buds
D) Neural crest cells
3. Notochord induces formation of:
A) Somites
B) Vertebral column
C) Lens of eye
D) Heart
4. Cloacal membrane divides cloaca into:
A) Rectum and anus
B) Urinary bladder and urethra
C) Uterus and vagina
D) Ovaries and testes
5. Yolk sac forms extraembryonic:
A) Amnion
B) Chorion
C) Allantois
D) Mesoderm
6. Structure differentiated from intermediate mesoderm is:
A) Nephrons
B) Blood
C) Lymph
D) Heart
7. Fate of dorsal mesoderm is:
A) Skin and muscle
B) Notochord
C) Somites
D) Limb bone marrow
8. Germ cell migration occurs through:
A) Yolk sac
B) Urogential ridge
C) Dorsal mesentery
D) Hindgut
9. Critical period of genital tubercle development is:
A) 4th week
B) 6th week
C) 8th week
D) 10th week
10. Structure connecting umbilical vesicle to yolk sac is:
A) Allantois
B) Chorion
C) Amnion
D) Vitelline duct
11. Site of testis descent is:
A) Deep inguinal ring
B) Superficial inguinal ring
C) External abdominal ring
D) Scrotum
12. Lining of coelomic cavity is known as:
A) Mesoderm
B) Endoderm
C) Ectoderm
D) Mesothelium
13. Pharyngeal arch artery giving rise to maxillary artery is:
A) 1st
B) 2nd
C) 3rd
D) 4th
14. Structure associated with cloacal membrane is:
A) Urethral folds
B) Müllerian duct
C) Seminal vesicles
D) Wolffian duct
15. Trophoblast differentiation gives rise to:
A) Cytotrophoblast
B) Synctiotrophoblast
C) Chorion
D) All of the above
16. Process leads to formation of amniotic cavity is:
A) Implantation
B) Gastrulation
C) Neurulation
D) Blastulation
17. Notochord develops from:
A) Ectoderm
B) Mesoderm
C) Endoderm
D) Prochordal plate
18. In humans, pronephros differentiates into:
A) Metanephros
B) Mesonephros
C) Kidney
D) Urachus
19. Fertilization occurs in:
A) Ovary
B) Uterus
C) Fallopian tube
D) Cervix
20. Folds appear on neural plate during:
A) Neurulation
B) Gastrulation
C) Blastulation
D) Implantation
21. Structure where umbilical cord inserts is:
A) Placenta
B) Chorion
C) Amnion
D) Yolk sac
22. Wolffian duct in male differentiates to form:
A) Epididymis
B) Vas deferens
C) Seminal vesicle
D) Prostate
23. Site of implantation of blastocyst is:
A) Endometrium
B) Myometrium
C) Broad ligament
D) Cervix
24. Structure formed from lateral plate mesoderm is:
A) Notochord
B) Somite
C) Limb bud
D) Urinary bladder
25. Female gonad differentiates into:
A) Ovary
B) Testis
C) Oviduct
D) Vagina
26. Conduction system of heart arises from:
A) Cardiac jelly
B) Endocardial tubes
C) Myocardium
D) Epicardium
27. Neural crest cells give rise to:
A) Bone
B) Adrenal medulla
C) Spinal ganglia
D) All of the above
28. Receptor for sonic hedgehog is:
A) Patched
B) Indian hedgehog
C) Pax1/9
D) Wnt
29. Site of gubernacular descent of testis is :
A) Deep inguinal ring
B) Superficial inguinal ring
C) External iliac ring
D) Scrotum
30. Process that transforms neural plate to neural tube is:
A) Neurulation
B) Gastrulation
C) Organogenesis
D) Histogenesis
31. Structure carrying waste products from embryo is:
A) Umbilical vein
B) Umbilical artery
C) Allantois
D) Yolk sac
32. Site of testosterone production is:
A) Leydig cells
B) Sertoli cells
C) Interstitial cells
D) Spermatozoa
33. Formation of secondary oocyte occurs in:
A) Ovary
B) Uterus
C) Fallopian tube
D) Vagina
34. Segmental vessel gives rise to:
A) Umbilical artery
B) Axillary artery
C) Common iliac artery
D) Internal iliac artery
35. Site of primordial germ cell migration is:
A) Endodermal layer
B) ectoderm
C) Mesoderm
D) notochord
36. Divisions of embryonic period are:
A) Germinal, fetal, neonatal
B) Germinal, embryonic, fetal
C) Embryonic, fetal, neonatal
D) Germinal, embryonic, neonatal
37. Cells contributing to formation of decidua are:
A) Fibroblasts
B) Monocytes
C) Leukocytes
D) Trophoblasts
38. Opening between abdominal cavity and umbilical cord is:
A) Umbilical ring
B) Umbilical hiatus
C) Urachus
D) Umbilical arteries
39. Membrane enclosing embryo is:
A) Amnion
B) Chorion
C) Allantois
D) Yolk sac
40. Process occurring at 4-5 weeks is:
A) Implantation
B) Organogenesis
C) Fetal circulation
D) Neurulation
41. Structure crossed by embryonal arteries is:
A) Somites
B) Post oct dermatome
C) Notochord
D) Intermediate mesoderm
42. Early development up to day 14 is termed:
A) Embryonic
B) Fetal
C) Neonatal
D) Germinal
43. Lining of coelom is formed from:
A) Hypoblast
B) Epiblast
C) Mesoderm
D) Endoderm
44. Neural crest migrates from:
A) Neural plate border
B) Primitive knot
C) Primitive groove
D) Neural folds
45. First sign of embryonic development is:
A) Implantation
B) Formation of morula
C) Gastrulation
D) Neurulation
46. Membrane enclosing embryo is:
A) Amnion
B) Chorion
C) Yolk sac
D) Allantois
47. Process of invagination:
A) Morulation
B) Gastrulation
C) Neurulation
D) Organogenesis
48. Structure forms from splanchnopleur:
A) Notochord
B) Somites
C) Gut tube
D) Kidney
49. Structure leads to formation of intraembryonic mesoderm:
A) Neurulation
B) notochord
C) primitive groove
D) primitive node
50. Germ cell marker is:
A) Oct3/4
B) Hox genes
C) BMP4
D) NANOG
51. Secondary oocyte is released from:
A) Ovary
B) Oviduct
C) Uterus
D) Vagina
52. Communication between amniotic cavity and yolk sac closes on:
A) 14 days
B) 21 days
C) 28 days
D) 3 months