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

Which compounds results from cyclization of glucose, Which of the following...

Which of the following compounds results from cyclization of glucose? Select one: a. alpha-D-glucopyronose b. beta-D-glucopyronose c. alpha-D-glucofuranose d. beta-D

Describe the supra cardiac type of tapvc, Describe the Supra Cardiac Type o...

Describe the Supra Cardiac Type of TAPVC ? After connecting the baby to cnrdiopulmonary bypass, the common pulmonary venous channel is dissected. This lies behind the left atr

Eexplain importance of mitosis for the embryonic development, What is the i...

What is the importance of mitosis for the embryonic development? Every embryo grows from a single cell that suffers mitosis and operates other cells that also divide themselves

Mode of nutrition , What is the mode of nutrition in fish,human,amoeba,scor...

What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?

Tricuspid annuloplasty-types of surgery, Tricuspid Annuloplasty :  Tr...

Tricuspid Annuloplasty :  Tricuspid valve is evaluated by digital palpation before connecting the patient to cardio pulmonary by pass. Functional regurgitation can be repaire

What are blood enzymes, What are blood enzymes? Enzymes are proteins th...

What are blood enzymes? Enzymes are proteins that take out chemical reactions (as opposed to structural enzymes). Most of the detectable enzymes in the blood come from the seve

Define source of electrons - growth of microorganism, Define Source of Elec...

Define Source of Electrons - Growth of Microorganism? Depending upon the source of electrons used by microorganisms, these are known as - a) Lithotrophs (rock eaters) - use

Calculate the electric potential, The three charges in the are at the verti...

The three charges in the are at the vertices of an isosceles triangle. Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.

Explain cholera, Cholera  The risk of infection with cholera is very lo...

Cholera  The risk of infection with cholera is very low in tourists. The parenteral vaccine licensed in the US is no longer available. One oral vaccine called Dukoral is availa

What is single ventricle physiology, What is Single Ventricle Physiology ? ...

What is Single Ventricle Physiology ? In complete correction of a congenital cardiac condition, it is ideal to have two ventricle correction (Pulmonary and systemic ventricles

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