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

Acid hydrolysis of non-reducing sugar, Q. Acid Hydrolysis of Non-Reducing S...

Q. Acid Hydrolysis of Non-Reducing Sugar? It involves the acid hydrolysis of non-reducing sugars to reducing sugars. It is also known as the process of inversion. Acid hydrolys

Evolution, how to calculate the frequency of mating with the HW equation?

how to calculate the frequency of mating with the HW equation?

Products of cleavage - morula and blastula, Products of Cleavage (Morula an...

Products of Cleavage (Morula and blastula) In several cases, the blastomeres in early cleaving stages tend to presume spherical shape like that of the egg earlier than cleava

Lymphatic drainage of the heart, The heart is drained by vessels that trave...

The heart is drained by vessels that travel in the interventricular and atrioventricular grooves. One set runs in the anterior part of the atrio-ventricular groove. The vessels of

Procedures for diagnosis - epidemiological data , Procedures for diagnosis ...

Procedures for diagnosis Epidemiological data:   The epidemiological information with regard to the history, symptoms, morbidity, mortality, seasonality, age, sex, breed and spe

Explain acute mr murmur in heart dieases, Explain Acute MR Murmur in heart ...

Explain Acute MR Murmur in heart dieases? MR due to ruptured papillary muscle, ruptured chordae tendinae, or due to Infective Endocarditis/Myocardial infarction. Characteri

Lung abscess, Lung Abscess: Lung  abscess  is a localised collection o...

Lung Abscess: Lung  abscess  is a localised collection of pus in  the pulmonary parenchyma as a result of  suppuration and necrosis. The obstruction  of the bronchus of the in

What do you understand by term - acanthus, What do you understand by term -...

What do you understand by term - acanthus The egg and larval phase of an acanthocephalan which passes from the female parasite to the feces of host.

Explain gametophyte, "In these autotrophs, sporophyte is the dominant gener...

"In these autotrophs, sporophyte is the dominant generation. Gametophyte is also photosynthetic and not dependent on sporophyte for nutrition."  These autotrophs are:  a.  P

Does the fish heart pump venous or arterial blood, Q. Does the fish heart p...

Q. Does the fish heart pump venous or arterial blood? After oxygenation in the gills the arterial blood goes to the tissues so the fish heart pumps venous blood, the venous blo

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