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

Alzheimer’s disease research paper, Alzheimer's  disease -  a  devastating ...

Alzheimer's  disease -  a  devastating  brain  disease  which  gradually  ruins  the  ,  thinking  skills,  patient's  memory and  ultimately  the  ability  to  perform  the  simpl

What is carrier protein, How does the interaction between a carrier protein...

How does the interaction between a carrier protein and the substance it transports resemble the interaction among an enzyme and its substrate? Both include the binding of a spe

Lower calorific value (lcv) or net calorific value (ncv), It is defined as ...

It is defined as the amount of heat liberated when one unit mass of fuel is burnt and the products of combustion are allowed to escape.                                  LCV = HC

How does the intensity of simple diffusion differ, How does the intensity o...

How does the intensity of simple diffusion differ in relation to the concentration gradient of the moved substance? The higher the concentration gradient of a substance the ext

Head - structure of the sperm, Head - Structure of the Sperm It exhib...

Head - Structure of the Sperm It exhibits a diversity of shapes in different animal groups, e.g., spherical (teleost fishes), rod or lance shaped (amphibians), spirally twist

What is the digestive enzyme that acts within the stomach, Q. What is the d...

Q. What is the digestive enzyme that acts within the stomach? Which type of food does it digest? What are the cells that produce that enzyme? The digestive enzyme that acts in

Combined use of diuretics, Combination of diuretics may be indicated in pat...

Combination of diuretics may be indicated in patients previously resistant to furosemide alone. Profound diuresis and clinical improvement may occur after the addition of metolazon

Counselling diabetic travellers, Counselling Diabetic Travellers The c...

Counselling Diabetic Travellers The counsellor needs to educate a diabetic patient and /or his family members to following issues when such patients plan to travel: ·  Plan

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