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

Explain the coverage of ecology and evolution, Coverage of Ecology AND Evol...

Coverage of Ecology AND Evolution to include: Ecology Impact of HTC and/or IRC on chemical usage and the ecological and/or evolutionary impact of the chemical usage

Describe how a phagocyte destroys bacteria, Describe how a phagocyte destro...

Describe how a phagocyte destroys bacteria. The phagocyte forms a pouch in its cell membrane and engulfs bacteria in the pouch. It then pinches off the pouch to produce a vesi

Use of neurotensin in consciousness, Q. Use of Neurotensin in consciousness...

Q. Use of Neurotensin in consciousness? Although little is known about the role of this peptide during the sleep-wake cycle, it has recently been shown that neurotensin injecti

Explain arterial continuous mummer, Explain arterial continuous mummer? ...

Explain arterial continuous mummer? Arterial Continuous Mummer : These originate in constricted arteries as in carotid or femoral artery obstruction (Mummer are louder in sys

Explain some advantages of most probable number, Explain some Advantages of...

Explain some Advantages of Most Probable Number? 1. It is simple and method of choice for determining fecal coliform densities. 2. Results of different laboratories are comp

Explain syphilis and hiv, Syphilis and HIV Most clinicians treat HIV-i...

Syphilis and HIV Most clinicians treat HIV-infected patients with syphilis and normal CSF with standard penicillin doses for the stage of syphilis, but some patients may need

Prevention strategy for diverticular disease, Q. Prevention strategy for di...

Q. Prevention strategy for diverticular disease? The prevention strategy for the disease involves the following: • Eat a high-fiber diet (more than 15 g/day of crude fiber)

Chemicals of life, give two examples of chemical reactions which are cataly...

give two examples of chemical reactions which are catalysed by enzymes in the course of brewing

Explain functional property of waterbinding - whey protein, Explain Functi...

Explain Functional property of  WaterBinding/ Hydration Mode of action  Proteins can help reduce formula costs as the proteins hold additional water. Food system

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