Question

The correct sequence of events during embryonic development is
(A) Cleavage- differentiation- fertilization- gastrulation
(B) Differentiation- fertilization- gastrulation- differentiation
(C) Fertilization- cleavage- gastrulation- differentiation
(D) Fertilization- differentiation- cleavage- gastrulation
(E) Fertilization- gastrulation- differentiation- cleavage

Answer 1

Hint: The advancement of the embryo into the complete organism happens by the cycle of the embryogenesis. This embryogenesis follows the arrangement of the cycle and it begins with the combination of the male and the female gamete to create the embryo and result in the complete person.

Complete Answer:
- Fertilization is the first step during the process of embryogenesis. It happens by the combination of the male and the female gamete. The consequence of the preparation is the arrangement of the zygote.
- Zygote is the kind of the eukaryotic cell and contains the genome of both the male and the female gametes. It is the fertilized ovum in the female fallopian tube which is the consequence of the fertilization. After the zygote arrangement, the cycle of cleavage happens. It is characterized as the cycle wherein the cells of the zygote go through the cell division.
- The cells that are partitioned from the parent zygote cells are called the blastomeres. In humans and animals, the cleavage happens radially. This cleavage at that point follows the phases of the morula, blastula and the gastrula.
- The morula stage is the phase of the zygote which contains sixteen cells of the blastomeres and the zygote shows up as the strong ball. At that point the rehashed cell division causes the single layer of the cells called blastula and which develops into the multi layered cells called gastrula. Hence the correct sequence of the embryogenesis is Fertilization- cleavage- gastrulation- differentiation.

Thus, the option (C) is correct.

Note: Morula shows up as the strong ball of the cells and the blastula shows up as the empty ball since it contains just the single layer of the cells. These two cycles are followed by the gastrula which shows up as the cup molded cells which are multilayered.