Cleavage and gastrulation, Biology

Assignment Help:

Cleavage and Gastrulation

Eventually, one spermatozoon fuses with the ovum to r restore the diploid genomic condition and activates all the potentials in the fertilized egg cell or zygote to develop into a new individual of the next generation. But the zygote is one cell and the adult body in the Metazoa is constituted of many cells - from a few hundred to many billions of cells. It implies that the unicellular zygote must enter the phase of rapid divisions in quick succession to convert itself into a multicellular body.

Such a series of divisions of the zygote is known as cleavage or segmentation. In this multicellular structure formed as a result of cleavage the various cells or cell groups later become rearranged as layers and sub layers during a process called gastrulation. Cleavage and gastrulation are significant phases in the ontogenetic development because cleavage transforms the unicellular zygote into a multicellular body and gastrulation lays the foundation of primary organ rudiments so as to initiate the formation of organs according to the body plan of the particular metazoan group of animals to which the particular individual belongs.


Related Discussions:- Cleavage and gastrulation

Limnology, Limnology : It is the study of organisms present in rivers or fr...

Limnology : It is the study of organisms present in rivers or fresh water lakes. Limnology is also called as freshwater science. This is the study of inland waters. Limnology is of

Difference between diastolesystole and systole, Q. What is the difference b...

Q. What is the difference between diastoleSystole and systole and diastole are the two stages into which the cardiac cycle is divided Diastole is the stage of the cardiac cycle

What is the critical photoperiod, What is the critical photoperiod? How can...

What is the critical photoperiod? How can the critical photoperiod relate to flowering be experimentally determined? The critical photoperiod is the limit of the photoperiod du

Canine parvovirus infections, Canine parvovirus infections The canine p...

Canine parvovirus infections The canine parvovirus infections are caused by a virus, which belongs to the genus Parvovirus in the family Parvoviridae. This virus is similar to

Adenosine triphosphate (atp), Adenosine triphosphate (ATP) is a general fo...

Adenosine triphosphate (ATP) is a general form in which the energy is stored in living systems; comprises of a nucleotide (with ribose sugar) with three phosphate groups. Energy c

Different from the interphase of meiosis, Q. Is the interphase of mitosis d...

Q. Is the interphase of mitosis different from the interphase of meiosis? The interphase mitosis that proceeds is similar to the interphase that precedes meiosis. In them the m

What is the difference between transcription and translation, What is the d...

What is the difference between transcription and translation? Transcription is the name given to the formation of RNA molecules from an open DNA chain used as a template. Trans

Explain about periimplant probing depth, Periimplant Probing Depth In c...

Periimplant Probing Depth In contrast to natural teeth, for which the average periodontal probing depth (PD) has been reported, the physiologic depth of the periimplant sulcus

What is physiology root pressure explain briiefly, What is Physiology: Root...

What is Physiology: Root Pressure explain briiefly? Transport of water, minerals and nutrients within vascular plants is dramatically different from animals such as humans. Whe

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd