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

How oak trees affect lyme disease in humans, How does the production of aco...

How does the production of acorns by oak trees affect Lyme disease in humans?  When more acorns are produced by oak trees the populations of mice and deer that eat acorns enhan

Limb regeneration in anuran amphibians, Limb Regeneration in Anuran Amphibi...

Limb Regeneration in Anuran Amphibians We are already aware that the limb of adult frogs does not regenerate later than amputation. Though, some regeneration has been found to

Explain risk management, Explain Risk Management Risk Management :  ...

Explain Risk Management Risk Management :  The  process  of weighing  policy  alternatives  to accept, minimize or reduce assessed risks and  to select and  implement approp

Illustrate the types of Bone Remodeling, Illustrate the types of Bone Remod...

Illustrate the types of Bone Remodeling Bone remodeling occurs on existing bone surfaces. However, unlike modeling, remodeling cannot cause large changes in bone structure at a

How does the absence of a nuclear envelope in prokaryotes, How does the abs...

How does the absence of a nuclear envelope in prokaryotes prevent prokaryotes from controlling gene expression by modifying RNA after transcription? Without a nuclear envelope

Define reagents required for osazone test, Define Reagents Required for Osa...

Define Reagents Required for Osazone Test? - Solutions of glucose, galactose,fructose, lactose, maltose, sucrose. - Phenyl hydrazine mixture (2 parts of Phenylhydrazine hydr

Glycolysis, define glycolysis.describe the various steps of glycolysis

define glycolysis.describe the various steps of glycolysis

Nucleic acid hybridization, Nucleic acid thermodynamics is the learning of ...

Nucleic acid thermodynamics is the learning of how temperature affects the nucleic acid structure of dsDNA (double-stranded DNA). The melting temperature (Tm) is explained as the t

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