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

Function of noradrenaline in consciousness, Q. Function of Noradrenaline in...

Q. Function of Noradrenaline in consciousness? Increased level of noradrenalin is implicated in wakefulness. Locus coeruleus noradrenergic neurons decrease their rate of firing

Economic dimensions of financing healthcare, Economic Dimensions of Financi...

Economic Dimensions of Financing Healthcare Establishment of adequate healthcare services, accessible/affordable to all sections of the society, is an important function of th

Fluid management in diarrhoea, Q. Fluid management in Diarrhoea? Fluid ...

Q. Fluid management in Diarrhoea? Fluid management: The key to diarrhoea management is the early replacement of fluid lost in the stools through intravenous or oral route. Whil

What is deletion of cell, What is Deletion of cell? A deletion is simpl...

What is Deletion of cell? A deletion is simply when a tip or fragment of a chromosome breaks off and fails to reattach itself to the chromosome from which it came. The gene, or

Define interaction of vitamin c with nicotinic acid, Define interaction of ...

Define interaction of vitamin c with Nicotinic acid? NAD, NADP and NMN act as constituents of the hydrogen transferring coenzymes in glycolysis, Kreb's cycle and in the oxidati

What are mutagenic agents, What are mutagenic agents? The Mutagenic age...

What are mutagenic agents? The Mutagenic agents, or mutagens, are physical, chemical or biological factors that can cause alteration in DNA molecules. Instances of believed

Define criteria for assessment of pyridoxine status, Define Criteria for As...

Define Criteria for Assessment of Pyridoxine Status? Vitamin B 6 status is most appropriately evaluated by using a combination of indicators,  namely plasma PLP concentration,

Why should posterior wall preffered during surgery, Why should Posterior wa...

Why should Posterior wall preffered during surgery Posterior wall should not be perforated during surgery. This limits bleeding from the pterygoid plexus or branches of the max

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