Principles governing cleavage, Biology

Assignment Help:

Principles Governing Cleavage

a) The nucleus and mitotic achromatic figure tend to occupy the centre of active cytoplasmic density of the dividing cells, e.g., in isolecithal eggs or microlecithal eggs, the spindle is formed centrally in the cell while in the telolecithal eggs, and it is formed nearer the animal pole.

b) Each new cleavage furrow tends to intersect the plane of the preceding cleavage furrow at right angle.

c) The cells or blastomeres tend to divide into two equal sized daughter cells unless yolk is unevenly distributed.

d) Free sides of the blastomeres tend to become rounded.


Related Discussions:- Principles governing cleavage

What are the results of chrchronic pulmonary thromboembolism, What are the ...

What are the Results of Chronic Pulmonary Thromboembolism? Results :  The reported mortality is between 5 and 24 per cent. On follow-up, the six-year survival in the best ce

Explain about the zone electrophoresis, Explain about the Zone Electrophore...

Explain about the Zone Electrophoresis? Zone electrophoresis which was introduced about a decade later describes the migration of charged macromolecules in a porous supporting

Mycoplasmosi, MYCOPLASMOSIS Mycoplasma organisms are the smallest free li...

MYCOPLASMOSIS Mycoplasma organisms are the smallest free living, lack of cell-wall and bounded by a triple layer of plasma membrane. The organisms are pleuomorphic in shape, viz.

How do antibodies work to neutralize antigens, Q. How do antibodies work to...

Q. How do antibodies work to neutralize antigens? The immunoglobulins or antibodies act to facilitate the destruction of antigens: they attract phagocytic leukocytes, they dire

How many different genotypes can the individual present, Considering a pair...

Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present? If a gene of a diploid spec

Explain in details class hirudenia - leeches, Explain in details Class Hiru...

Explain in details Class Hirudenia - Leeches? This group includes the leeches. Most leeches grow in tropical freshwater habitats, and are familiar to most people as bloodsucker

Exploitation of forests, Exploitation of Forests Exploitation of our f...

Exploitation of Forests Exploitation of our forests for commercial purposes and for food and fodder cannot be stopped completely because of symbiotic relationship between fore

How is heart contraction triggered, How is heart contraction triggered? ...

How is heart contraction triggered? Heart contraction is independent from neuronal stimulus (although it can be modulated by the autonomous nervous system). In the heart there

Bacterial diseases-anthrax, Anthrax Synonym              :    Wool sor...

Anthrax Synonym              :    Wool sorter’s disease Species affected    :    Cattle, sheep, goats, pig, horse and majority of the mammals. Fowls are resistant to anthr

List the routine treatment sequence for an implant patient, List the routin...

List the routine treatment sequence for an implant patient. The different phases are - Preliminary treatment - Stage I surgical phase - Stage II surgery and Prosthetic

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