Development from Zygote to Blastocyst

Q.

Whats a gastrula?

Q.

How long does it take a morula to become a blastocyst?

Q.

Morula is a developmental stage___________

1. between the zygote and blastocyst

2. between the blastocyst and gastrula

3. after the implantation

4. between implantation and parturition

Q.

Morula differs from the blastula in the

1. Absence of cavity

2. Presence of cavity

3. Absence of yolk

4. None of these

Q.

A zygote is completely divided into two by a cleavage furrow. This type of cleavage is________

1. equatorial

2. meroblastic

3. radial

4. holoblastic

Q. Match the following and choose the correct answer

A	Zona hatching	(i)	mitotic division of the zygote
B	Trophoblast	(ii)	embedding of the blastocyst in the endometrium
C	Cleavage	(iii)	blastocyst releasing from zona pellucida
D	Implantation	(iv)	outer layer of blastocyst attached to the endometrium

1. A- (iii), B-(i), C-(ii), D-(iv)
   
2. A- (iii), B-(iv), C-(i), D-(ii)
3. A- (ii), B-(i), C-(iii), D-(iv)
   
4. A- (ii), B-(iv), C-(iii), D-(i)