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

Activation of a fatty acid, Small-  and  medium-chain   acyl  CoA  molecule...

Small-  and  medium-chain   acyl  CoA  molecules  (up  to  10  carbon  atoms)  are readily capable to cross the inner mitochondrial  membrane by diffusion. Furthermore, longer chai

What might explain the pattern, A group of Ethiopians were assayed for CCR5...

A group of Ethiopians were assayed for CCR5-del32 deletion polymorphism. 223 were +/+, 64 were +/del32, and 6 were del32/del32. Are the observed data significantly different from H

Explain carbonating - method of food preservation, Explain Carbonating - me...

Explain Carbonating - method of food preservation? Carbonated water is the water in which carbon dioxide gas has been dissolved under pressure. By eliminating oxygen, carbonate

Zoonotic diseases-influenza, Influenza Influenza is an acute infectious di...

Influenza Influenza is an acute infectious disease caused by influenza viruses of genus Orthomyxovirus in family Orthomyxoviridae. The name Influenza is derived from an Italian ph

How does refrigeration help to stop food from going bad, How does refrigera...

How does refrigeration help to stop food from going bad?   Western diets are often unhealthy due to they have too much sugar and fat, and not sufficient fibre.

What is the neurotransmitter of the neuromuscular junction, Q. What is the ...

Q. What is the neurotransmitter of the neuromuscular junction? How does the nervous system trigger muscle contraction? The nervous cells that trigger the muscle contraction are

Explain about the oral cavity and alimental-y tract, Explain about the Oral...

Explain about the Oral cavity and alimental-y tract? Various functional changes and decline in secretary function occur in the digestive tract with aging. These include: Or

Temperature and concentration of nutrients, Temperature and Concentration o...

Temperature and Concentration of Nutrients Temperature Temperature like salinity remains almost constant in the oceans in contrast to the land or terrestrial ecosystems

Reproductive mechanisms, Normal 0 false false false EN-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

How to investigate aortic stenosis by cardiaccatheterization, Q. How to inv...

Q. How to investigate aortic stenosis by Cardiac Catheterization? The indications are to confirm hemodynamics when the non-invasive tests are not conclusive or there is a disc

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