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

Zoonoses disease-zoonotic paramyxoviruses, Zoonotic paramyxoviruses Three ...

Zoonotic paramyxoviruses Three zoonotic paramyxoviruses (Hendra, Menangle, and Nipah viruses) emerged during 1994-2004 and all these viruses have a fruit bat reservoir. Humans are

Explain the stages in taxonomic procedures - beta taxonomy, Explain the sta...

Explain the stages in taxonomic procedures - Beta Taxonomy This stage is also known as macro taxonomy or synthesis taxonomy. At this level the species are arranged or classifie

Baby delivery, some deliveries of baby occur early na. y is it so?

some deliveries of baby occur early na. y is it so?

Lymphatic drainage of the heart, The heart is drained by vessels that trave...

The heart is drained by vessels that travel in the interventricular and atrioventricular grooves. One set runs in the anterior part of the atrio-ventricular groove. The vessels of

Explain about the paediatric and geriatric nutrition, Explain about the Pae...

Explain about the Paediatric and Geriatric Nutrition? Every stage has its unique requirements due to different changing needs. Adequate and optimum nutrition support is very im

Donor selection and kidney preservation, DONO R SELECTION & KIDNEY PRESERV...

DONO R SELECTION & KIDNEY PRESERVATION - A kidney donor should be free of hypertension, diabetes & melignancy. Cardaveric kidney is obtained from brain death person. Kidney

What are the main human diseases caused by virus, What are the main human d...

What are the main human diseases caused by virus? Between diseases caused by virus are common cold, flu, mumps, variola (considered eradicated nowadays), rubella, AIDS, measles

Explain the procedure for preparation of bacterial smear, Explain the Proce...

Explain the Procedure for Preparation of Bacterial Smear? Start the exercise by following the steps enumerated herewith. (1) Take properly washed and dried glass slides for

Nursing responsibilities while administering immunization, NURSING RESPONSI...

NURSING RESPONSIBILITIES WHILE ADMINISTERING IMMUNIZATION Use one sterile syringe and needle for each injection.  Use only the diluent supplied along with measles and

Explain about selection of healing abutment, Selection of healing abutment ...

Selection of healing abutment It is done depending upon the tissue thickness. Tissue thickness can be measured similar to ridge mapping or sounding procedure, wherein after an

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