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

What are the symptoms of rheumatic heart disease, Q. What are the symptoms ...

Q. What are the symptoms of Rheumatic Heart Disease? Symptoms generally appear after 1 to 6 weeks of the fever and sometimes the infection may have been too mild to have been r

Explain the taxonomy of lamarck, Explain the taxonomy of Lamarck? Lamar...

Explain the taxonomy of Lamarck? Lamarck's taxonomy was mainly static in nature and his classification does not show its true value to the development of modern taxonomy. His m

Explain about food processing and engineering, Explain about Food processin...

Explain about Food processing and engineering? Fundamental engineering concepts like momentum, heat and mass-transport systems; engineering aspects of food processing plant ope

Include the uncertainty interval and confidence level, What is the minimum ...

What is the minimum sample weight, at USP standards (U = 0.1% and k = 3), that can be measured on an analytic balance in which the repeatability is 0.0001 g. Include the uncertaint

Nervous system and types of reproduction, Q Annelid Identity card. How are ...

Q Annelid Identity card. How are they characterized according to examples of representing beings, type of symmetry, basic morphology, germ layers and coelom, respiratory system, di

Determine the principles of Behavioural neuropsychology , Determine the pri...

Determine the principles of Behavioural neuropsychology Behavioural neuropsychology approaches are based on the principles of learning theory and behavioural modification. Beh

What is the implant site evaluation, Implant site evaluation 1. Ridge:...

Implant site evaluation 1. Ridge: Total buccolingual width of the ridge- the thickness of the soft tissue ( bucally +lingually)= Buccolingual width of the bone. There shou

Define photoorganoheterotrophs and chemoorganoheterotrophs, Photoorganohete...

Photoorganoheterotrophs and Chemoorganoheterotrophs - Nutritional Types (1) Photoorganoheterotrophs - These microorganisms use light as a source of energy and organic compound

Define spiral cleavage in brief., Define Spiral cleavage in brief. Patt...

Define Spiral cleavage in brief. Pattern of cell division in the developing embryo where products of the cell divisions shift by rotating either counterclockwise or clockwise s

Functions of albumin and myosin, Q. What are respectively some remarkable f...

Q. What are respectively some remarkable functions of albumin, myosin, CD 4 , keratin, immunoglobulin, reverse transcriptase, hemoglobin and insulin? Myosin is a protein that w

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