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

Proteases of animals, Proteases of animals From the table you can see ...

Proteases of animals From the table you can see that these exopeptidases and endopeptidases attack specific peptide bonds depending on the chemical group near them. The inacti

Explain cap site, Cap site Two usages are given below: 1] In eukaryotes...

Cap site Two usages are given below: 1] In eukaryotes, the cap site is position in the gene at which transcription begins, and really should be called the "transcription initia

What is nucleus where it is found, What is nucleus where it is found? ...

What is nucleus where it is found? Nucleus :  The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The

Ventilation of tracheal system, Ventilation of Tracheal System The man...

Ventilation of Tracheal System The manner in which tracheae are ventilated varies with species of insects but movement of air is achieved in two ways: Diffusion

Four distinct phases of demographic transition, Four Distinct Phases of Dem...

Four Distinct Phases of Demographic Transition Demographic transition takes place in four distinct phases. 1. Re-industrial stage in which harsh living conditions lead to

Explain prophylaxis of lyme disease, Explain Prophylaxis of lyme disease ...

Explain Prophylaxis of lyme disease No vaccine is currently available to prevent Lyme disease in humans. Avoidance of ticks and use of tick repellents such as DEET or picaridin

Explain lane eynon method procedure, Q. Explain Lane Eynon Method procedure...

Q. Explain Lane Eynon Method procedure? You will be carrying out the procedure in two steps using Lane Eynon Method. Step 1 It involves the standardization of copper s

Explain the theory of law of minimum, Explain the theory of Law of Minimum ...

Explain the theory of Law of Minimum    This is one of the earliest hypotheses put forward by von Liebig on the relationship between the amount of plant  nutrient in the soil a

Determine the term clade, Determine the term Clade? In cladistic taxono...

Determine the term Clade? In cladistic taxonomy, how groups of animals are related to each other. It includes the ancestral group and all of the other groups, or lineages, of a

Explain in detail about the optic nerve, Explain in detail about the optic ...

Explain in detail about the optic nerve The optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina. This structure originatcs a

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