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

Horse diseases-equine encephalomyelitis, Equine encephalomyelitis Encep...

Equine encephalomyelitis Encephalomyelitis or inflammation of the brain tissue and the spinal cord, can be brought about by different viruses. Eastern-, Western- and Venezuelan

Determine the representation of the nucleus, Determine the representation o...

Determine the representation of the Nucleus In all eukaryotic cells, the nucleus represents the most prominent and conspicuous organelle of the cell, and is generally seen as a

Explain the recommended dietary allowances - nutrition, Explain the Recomme...

Explain the Recommended Dietary Allowances - Nutrition? The recommended dietary allowances are defined as the 'daily dietary intake level that is sufficient to meet the nutrien

Viral genome, describe the different types of genomes that viruses can have...

describe the different types of genomes that viruses can have

Describe sensory receptors, Q. Describe Sensory Receptors? Receptor org...

Q. Describe Sensory Receptors? Receptor organs can detect external or internal stimuli. They can be classified according to the stimulus to which they respond: • Photorecep

Oral route - administration of drugs, Oral Route Paediatric Medication...

Oral Route Paediatric Medications are prepared as Tablets (which can be crushed), powders, granules, mixtures, emulsions, elixirs and syrups. It is easier to persuade olde

Fertilisation, Explain how the uterus supports the development of a baby du...

Explain how the uterus supports the development of a baby during gestation

Explain three main steps for a good study of genetic tree, What are the thr...

What are the three main steps for a good study of a genetic family tree? Step 1: to determine whether the studied phenotypical form has a dominant or recessive pattern. Step

Aba - dormancy, ABA - Dormancy Abscisic acid functions as an antagonis...

ABA - Dormancy Abscisic acid functions as an antagonist of all three promoters like IAA, GAS and Cytokinins. ABA nullifies the activity of GA, IAA and cytokinin right by a)

Determine the different types of sensory receptors, Determine the different...

Determine the different types of sensory receptors There are different types of sensory receptors as follows:  Visual receptors in the eyes for vision.  Auditory receptor

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