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

Assessment of diastolic function, Diastolic dysfunction is  responsible for...

Diastolic dysfunction is  responsible for one third of cases of heart  failure alone and rest two  third of cases in  combination with systolic dysfunction. Diastolic dysfunction c

Explain other lipids in biological compound, Explain Other lipids in biolog...

Explain Other lipids in biological compound? Other Lipids :  Another important type of lipids are the steroids, with a basic structure consisting of four interconnecting carb

What does a two-direction arrow show in a chemical equation, What does a tw...

What does a two-direction arrow show in a chemical equation? The oxygen atoms share two pairs of electrons, as every atom needs two more electrons to fill the orbitals of its o

Define the role of fluorine in human body, Define the role of Fluorine in H...

Define the role of Fluorine in Human Body? Fluorine is potentially a toxic element. Its essentiality for humans is not established although the role of fluoride in providing pr

The polymerase chain reaction, The Polymerase Chain Reaction Kary Mulli...

The Polymerase Chain Reaction Kary Mullis established the technique of the polymerase chain reaction (PCR) in the year of 1983. He won a Nobel Prize for the procedure in the ye

The lowest and highest temperatures humans can survive, What are the lowest...

What are the lowest and highest temperatures humans can survive? Being in cold temperature air with proper shelter and clothing, humans can endure indefinitely, even if the tem

What is dynamic auscultation in heart surgery, What is Dynamic Auscultation...

What is Dynamic Auscultation in heart surgery? It involves determining the effects on heart sounds and murmurs of various physiological and pharmacological manoeuvres, which al

Some common air pollutants, The major air pollutants are: (i)     Carbo...

The major air pollutants are: (i)     Carbon monoxide, CO (ii)   Nitrogen oxides, (NO)x (iii) Sulphur oxide, (SO)x (iv) Ground level ozone (O3) (v)   Hydrocarbons (

Secondary prevention- preventive strategies for food allergy, Define Second...

Define Secondary prevention- preventive strategies for food allergy? Secondary Prevention: Attempts to inhibit expression of the disease despite sensitization. These are used f

Measuring ecosystem diversity, Measuring ecosystem diversity is not easy, a...

Measuring ecosystem diversity is not easy, and ther e is no definite index for its measurement. It is generally assessed by the measure of species diversity in an ecosystem, often

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