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 three main components of cytoskeletan, What is the cytoskeleton, a...

What is the cytoskeleton, and what are three of its main components? The cytoskeleton is a network of long protein strands located in the cytosol. Three main components are

Excretion, what is the composition of urine in fishes and reptiles ?

what is the composition of urine in fishes and reptiles ?

Gene organization, In marked contrast to prokaryotic genes where proteins a...

In marked contrast to prokaryotic genes where proteins are encoded by a continuous sequence of triplet codons and the vast popular of protein-coding genes in eukaryotes are discont

How have brain-imaging methods such as pet and mri, How have brain-imaging ...

How have brain-imaging methods such as PET and MRI affected neuroscience research and clinical care? Techniques which capture pictures of the living human brain at work have be

What is demographic transition, What is Demographic Transition? The who...

What is Demographic Transition? The whole process of change with regard to population size and characteristics is called demographic transition. In order to understand this ter

What is short bowel syndrome, Q. What is Short Bowel Syndrome? Short bo...

Q. What is Short Bowel Syndrome? Short bowel syndrome is a group of problems affecting people who have /had half or more of their small intestine removed. The massive resection

#title.examples of classes of vertebrates, how to explain an example from e...

how to explain an example from each class of vertebrate

Photosynthesis, how does the green plant build up carbohydrates

how does the green plant build up carbohydrates

Why is it important for chromosomes to be condensed, Why is it important fo...

Why is it important for chromosomes to be condensed during mitosis and decondensed during interphase? During mitosis the major problem to be solved is the correct separation of

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