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

What are the clinical warning signs of implant failure, Clinical warning si...

Clinical warning signs of implant failure The clinical signs of implant failure are: 1) Connecting Screw loosening. 2) Connecting Screw failure. 3) Gingival bleeding a

Ovary is half-inferior in which flower, Ovary is half-inferior in the flowe...

Ovary is half-inferior in the flowers of : 1. Guava 2. Plum 3. Brinjal 4. Cucumber Plum is the flower in which ovary is half - inferior

Determine about the disease - brain tumor, Determine about the disease - br...

Determine about the disease - brain tumor Tumor, or neoplasm, is a mass of new tissue that persists and grows independently of its surrounding structures and has no physiologic

Darwins theory of natural selection, Darwins theory of natural selection is...

Darwins theory of natural selection is considered a paradigm shift--a theory that has wide-ranging effects. Describe some of the advantages that this theory offered scientists once

Cytogenetics, describe five features of chromosomes used in cytogenetic ana...

describe five features of chromosomes used in cytogenetic analysis?

Explain reality theory, Reality Theory Developed in  the 1960s by  Will...

Reality Theory Developed in  the 1960s by  Willian glasser,  a  psychiatrist,  reality  therapists  view human nature in terms of behaviour. They believe that human behaviour i

Show the use of incineration for sterilization, Q. Show the Use of Incinera...

Q. Show the Use of Incineration for sterilization? This is an excellent method for rapidly destroying materials such as soiled dressings, animal carcasses, bedding and patholog

Describe ventricular and great vessel pressures, Q. Describe Ventricular an...

Q. Describe Ventricular and Great Vessel Pressures? Ventricular Pressure RV and LV waveforms are similar in morphology but different in magnitude. The duration of systole an

Determine major aspects of the mechanism of freeze drying, Determine Major ...

Determine Major Aspects of the Mechanism of Freeze Drying? The major aspects of the mechanism of freeze drying are:  (a) The removal of vapour from the subliming ice front w

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