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

Acid rain, The Phenomenon of acid rain was first introduced by Rober Angus ...

The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn

Explain supravalvular aortic stenosis murmur, Explain Supravalvular aortic ...

Explain Supravalvular aortic stenosis murmur? Supravalvular Aortic Stenosis Murmur : Characteristic: Murmur may be loudest in 1st Right ICS. It isn't associated with systolic

Define about the spectral techniques - colorimetry, Define about the Spectr...

Define about the Spectral Techniques - Colorimetry? Many determinations in the biochemistry laboratory are based on measurements of radiant energy emitted, transmitted, absorbe

Effect of genetic drift, Is the effect of genetic drift likely to be the sa...

Is the effect of genetic drift likely to be the same in pop 1 and pop 2? How are genetic drift and pop size related? when there is strong selection against the homozygous recessive

What is the sterile technique, Sterile Technique Every effort should be...

Sterile Technique Every effort should be made to conduct implant surgery under sterile operating conditions. Chlorhexidine 0.2% is used as a pre-operative mouthwash and skin pr

What are some prophylactic measures for tapeworm infections, What are some ...

What are some prophylactic measures for tapeworm infections? The main prophylactic measures against taeniasis and cysticercosis are: not to ingest raw or badly cooked swine or

Define energy and protein requirement in geriatric nutrition, Define Energy...

Define Energy and Protein requirements in geriatric nutrition? Decreased physical activity and changes in body composition and decreased basal metabolic rate affects the ma

Why pulses are important for human - nutritional factor, Why Pulses are imp...

Why Pulses are important for human - nutritional factor? Pulses are rich sources of proteins (20-25 g/100 g), the limiting amino acid being methioniize. However, protein quality

Clostridium botulinum, Clostridium botulinum is an anaerobic, Gram-positive...

Clostridium botulinum is an anaerobic, Gram-positive, spore forming, rod shaped bacteria that produces the potent neurotoxin. The organism and its spores are widely distributed in

Precautions for selective and differential medium, Precautions for Preparat...

Precautions for Preparation of Selective and Differential Medium 1. Dissolve ingredients one by one. 2. Check and set the medium to appropriate pH. 3. Autoclave the mediu

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