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

Mollusca, family ,genus, class order , species of mollusca

family ,genus, class order , species of mollusca

Explain the alterations occurring in meat and poultry, Alterations occurrin...

Alterations occurring in meat and poultry Meat, as you already know, is  rich in proteins and contains most of the essential amino acids.  It is also rich in minerals such as c

St-segment in exercise induced pvc, Q. What do you mean by  ST-Segment in ...

Q. What do you mean by  ST-Segment in Exercise Induced  PVC? Ans. Over the years it has been believed that repolarization in ventricular ectopic beats had no diagnostic si

Describe the planes of muscles, Describe the Planes of Muscles The plan...

Describe the Planes of Muscles The planes of superior and inferior recti in primary position form an angle of about 23 0 with the Y-axis. Therefore, the axis of rotation of th

Loudness, The sound levels of power, intensity and pressure are the physica...

The sound levels of power, intensity and pressure are the physical effects which the human ear receives, it is not, however, what the person perceives. What is being perceived or h

Manufacture of metallurgical coke, Using high temperature carbonization, me...

Using high temperature carbonization, metallurgical coke  (hard coke) can be prepared by two processes. 1.      Beehive coke oven process. 2.      Otto-hoffmann's by-product

Illustrate about components of an angioplasty system, Q. Illustrate about C...

Q. Illustrate about Components of an Angioplasty System? 1) Guiding catheter: The ideal guiding catheter must have a lumen diameter i.e. at least twice that of the diagnostic c

Segmentation - metazoa, Segmentation - Metazoa Segmentation or metamer...

Segmentation - Metazoa Segmentation or metamerism is the division of the body into smaller transverse compartments along the anterior-posterior axis. Segmentation is widesprea

What are holandric genes, What are holandric genes? The Holandric genes...

What are holandric genes? The Holandric genes are genes situated in the nonhomologous region of the Y chromosome. Holandric genes condition phenotypes that emerge only in men s

Describe the organization of the vascular plant body, Describe the Organiza...

Describe the Organization of the Vascular Plant Body? A typical plant body consists of two distinct systems: a root system and a shoot system. The root system is usually below

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