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

Gymnosperm affinities, basic difference beyween gymnosperm,angiosperm and p...

basic difference beyween gymnosperm,angiosperm and pteridophytes.

Illustrate about the insulin and insulin syring, Insulin, insulin syringe ...

Insulin, insulin syringe and insulin devices Insulin is the hormone used to treat diabetes mellitus. Insulin is given in the form of injection, because the gastro intestinal tr

Explain the term - neurochemical manipulations, Explain the term - Neuroche...

Explain the term - Neurochemical Manipulations Neurochemical and immunological methods have been used to identify groups of neurons in the central nervous system that use speci

Epilimnion - summer stratification, Epilimnion - Summer Stratification ...

Epilimnion - Summer Stratification This forms the upper layer of the lake and consists of freely- circulating warm water which is well lighted though poor in nutrients. Most o

Explain the endocrine glands involved in the menstrual cycle, What are the ...

What are the endocrine glands involved in the menstrual cycle? What are the hormones in action? The endocrine glands that secrete hormones included in the menstrual cycle are t

Describe ecosystem diversity, Q. Describe Ecosystem Diversity? Ecosyste...

Q. Describe Ecosystem Diversity? Ecosystem diversity means the variation between different types of ecosystems. Different species of animals, plants and micro-organisms interac

How is claimant need to make balance of probability, How is claimant need t...

How is claimant need to make balance of probability? When there is no loss suffered through a person after that there cannot be a civil proceeding not like under criminal law t

Explain the use of chlamydia in pregnancy, Use of Chlamydia in Pregnancy  ...

Use of Chlamydia in Pregnancy  Doxycycline, other tetracyclines and the flour quinolones generally should not be used during pregnancy. Azithromycin appears to be safe in pregn

How does the synthetic theory of evolution explain this fact, In hospitals ...

In hospitals where many tuberculosis patients are treated the population of the tuberculosis mycobacteria may be constituted of multiresistant (to antibiotics) strains. How does th

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