Correct sequence of embryo development:
1.  Gamete → Zygote → Morula → Blastula → Gastrula
2.  Gamete → Zygote → Blastula → Morula → Gastrula
3.  Gamete → Neurula → Gastrula
4.  Gamete → Neurula → Morula

Blastopore is the pore of:

1. Archenteron

2. Blastocoel

3. Coelom

4. A.C.

Cleavage in mammals is:

1. Holoblastic equal

2. Holoblastic unequal

3. Superficial

4. Discoidal

During embryonic development, the establishment of polarity along the anterior/posterior, dorsal/ventral, or medial/lateral axis is called:

1. Organizer phenomena

2. Axis formation

3. Anamorphosis

4. Pattern formation