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

Cartilage occur in a joint and what it its function, Where does cartilage o...

Where does cartilage occur in a joint and what it its function? Cartilage might be found covering the surface of bones where they meet in a movable joint. Cartilage decreases f

Excretion, The excretory of lizard

The excretory of lizard

What do you mean by hemodialysis, Q. What do you mean by hemodialysis? ...

Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

Explain the transcription and the replication processes, What are similarit...

What are similarities and differences among the transcription process and the replication processes? A DNA polynucleotide chain serves as a template in replication (DNA duplica

Describe chemical equation of photosynthesis?, Q. What is the chemical equa...

Q. What is the chemical equation of photosynthesis? The chemical equation of photosynthesis is given below: 6 CO 2 + 6 H 2 O + light --> C 6 H 12 O 6 + 6 O 2

Diagrammatic representation of implant placement, Diagrammatic representati...

Diagrammatic representation of Implant placement Implant placementIt is located directly apical to the tooth it is replacing and not in an embrasure space. The angulati

Describe the effects of insulin on carbohydrate metabolism, Q. Describe the...

Q. Describe the effects of insulin on carbohydrate metabolism? Insulin promotes muscle glucose uptake and metabolism. In presence of insulin muscle cells take up glucose and us

What is the nature of monosaccharides, What is the Nature of Monosaccharide...

What is the Nature of Monosaccharides? Monosaccharides are colourless, crystalline substances which are soluble in water but insoluble in non polar solvents. Monosaccharides ca

Two traits are involved in a genetic cross, In his experiments, Mendel note...

In his experiments, Mendel noted that when two traits are involved in a genetic cross, they are inherited independently of each other. The reason for this is that A. genes on the s

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