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

Dimensions of the cells, On a given microscope, the numerical aperture of t...

On a given microscope, the numerical aperture of the objective is 1.5. The microscope is provided with a filter that selects a wavelength of 500 nm. What is the limit of resolution

Classification of coal by rank, Coal can be classified into following categ...

Coal can be classified into following categories in the order of rank. Peat:  peat is a brown and fibrous mass. It is the first stage of coalification. It is not used as

What is the relationship between enzyme, Q. What is the relationship betwee...

Q. What is the relationship between enzyme and vitamins cofactors? Many vitamins are enzyme cofactors that cannot be synthesized by the organism and must be acquired from the d

genes occur on chromosome , In Drosophila, these genes occur on chromosome...

In Drosophila, these genes occur on chromosome 4. H - wild type (normal)     h - hairy F - wild type                   f - frizzled E - wild type                  e - vest

What are the etiological agents of malaria, Q. What are the etiological age...

Q. What are the etiological agents of malaria? The etiological agents of malaria are protozoans of the genus Plasmodium. There are four different kinds of plasmodia that cause

Endosperm Haustoria, Explain the presence of haustoria in nuclear and helob...

Explain the presence of haustoria in nuclear and helobial endosperm

Explain the use of enzyme assay, Explain the use of Enzyme assay Enzym...

Explain the use of Enzyme assay Enzyme assay is also used for research into such processes as the browning of plant products which poses problems during value addition. The br

Invertebrates - osmotic and ionic regulation, Invertebrates - Osmotic and I...

Invertebrates - Osmotic and Ionic Regulation Regulation of water and ions in invertebrates is done by neuroendocrine mechanism. It operates at the level of Malpighian tubules

Explain what an isotonic fluid loss means, Your client has the flu and repo...

Your client has the flu and reports 5-6 loose stools a day. He has experienced an isotonic fluid volume loss. Explain what an isotonic fluid loss means.

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