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 is lyophobic, What is lyophobic If the affinity of the dispersed p...

What is lyophobic If the affinity of the dispersed phase to go into or to remain in colloidal dispersion is slight, the dispersed phase is said to be lyophobic (solvent repelli

What is micro-endodontic surgery, What is Micro-Endodontic Surgery? Co...

What is Micro-Endodontic Surgery? Combines of the magnification and illumination provided by the microscope with proper use of new micro-instruments.

Regulation of pyruvate kinase, Regulation of pyruvate kinase, pyruvate carb...

Regulation of pyruvate kinase, pyruvate carboxylase and PEP carboxykinase A) In liver,  pyruvate  kinase  is inhibited  by high levels  of ATP and alanine  so which  glycolysis

Aetiology, Aetiology:   A List Of The Causes Of A Disease  (Description Of ...

Aetiology:   A List Of The Causes Of A Disease  (Description Of The Characteristic Causes) Factors Which Influence The Onset Of Disease:  Include "Risk Factors", Life-Style, Sex, A

Human development, Human Development Human development is a continuous...

Human Development Human development is a continuous procedure that begins when the ovum from a female is fertilised via sperm from a male to form the zygote. Growth and differ

Explain right atrial enlargement, Q. Explain Right Atrial Enlargement ? ...

Q. Explain Right Atrial Enlargement ? The right atrium (RA) is a globular chamber, forming the right heart border on the PA view. On the PA view, the border of the enlarged RA

Define the lens transparency in metabolism of lens, Define the lens transpa...

Define the lens transparency in metabolism of lens. Lens Transparency: a. Transparency depends on avoidance of large transitions of refractory index. This is in other wor

Explain the stages in taxonomic procedures - beta taxonomy, Explain the sta...

Explain the stages in taxonomic procedures - Beta Taxonomy This stage is also known as macro taxonomy or synthesis taxonomy. At this level the species are arranged or classifie

What is the significance of magnesium for plants, What is the significance ...

What is the significance of magnesium for plants? What are the other main biological functions of magnesium? Magnesium is fundamentally significant for plants because it is par

What is peripheral vein feeding, What is Peripheral Vein Feeding Intrav...

What is Peripheral Vein Feeding Intravenous feeding is a method of  providing parenteral nutrition when a  patient cannot take in food or formula through the gastrointestinal

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