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

Science in the ancient world, Science in the ancient  world: We have e...

Science in the ancient  world: We have explained why we should study the history of science and what we mean by the history of science. We have seen what science is like in t

Class of subphylum uniramia - insecta, Class of Subphylum Uniramia - Insect...

Class of Subphylum Uniramia - Insecta Class Insecta consists of nearly a million described species. There are more species of insects as compared to all the other species of a

Chronic bronchitis, Chronic Bronchitis Chronic Bronchitis is defined ...

Chronic Bronchitis Chronic Bronchitis is defined clinically as hypersecretion of mucus and recurrent episode of productive cough for a period of 3 months per year at least tw

What are plant tissues and leaf vien, What are plant tissues that constitut...

What are plant tissues that constitute the functional structures of the leaf veins ? The Leaf veins are made of the vascular tissues.They are constituted by the xylem and the p

Define foam spray drying method, Define Foam Spray Drying Method? This...

Define Foam Spray Drying Method? This is an extension of spray drying and involves the use of gases dissolved under pressure prior to spraying. The main advantage is that the

Flower - plant growth substances, Flower - Plant Growth Substances Flo...

Flower - Plant Growth Substances Floral initiation is a dramatic event involving a total changeover of the character and developmental pattern of the meristem. The stimulus ca

Genetically modified foods-maize, Normal 0 false false fals...

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

Do fishes there an open or closed circulatory system, Do fishes there an op...

Do fishes there an open or closed circulatory system? How many chambers does a fish heart have? How does blood flow all through the fish body? As in every vertebrate the circul

What is binary fission in cell reproduction, What is Binary Fission in cell...

What is Binary Fission in cell reproduction? Cell division takes place in prokaryotic cells by binary fission, also called prokaryotic fission. In prokaryotes, DNA is contained

Explain divisions of the angiosperms, Q. What are the two divisions of the ...

Q. What are the two divisions of the angiosperms? The angiosperms are divided into dicotyledonous and monocotyledonous.

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