Basic planes of cleavage, Biology

Assignment Help:

Basic Planes of Cleavage

The basic planes along which the egg and its daughter blastomeres are divided during early cleavage are:

A. Meridional Plane - the cleavage furrow passes from the animal pole to the vegetal pole through the centre of the spherical egg or the blastomeres so as to divide the egg into two equal halves, e.g., first cleavage furrow in the chick and first as well as second cleavage furrows in the frog's egg.

B. Vertical Plane - the cleavage furrow forms parallel to animal-vegetal axis but a little away from the centre of the blastomeres, e.g., thud cleavage plane of chick blastoderm.

C. Equatorial Plane - the cleavage furrow bisects the egg at right angle to the median axis exactly half way between the animal and vegetal poles the cleavage furrow appears along the equator of the spherical egg, e.g. the third cleavage plane of sea urchin.

D. Latitudinal or transverse or horizontal plane - it is like equatorial but the cleavage furrow passes through the egg cytoplasm on either side of equator along the latitudes of the egg sphere, e.g., third cleavage plane of amphibian eggs.


Related Discussions:- Basic planes of cleavage

Define sample collection and estimation of blood glucose, Define Sample col...

Define Sample collection and estimation of blood glucose? The aim of blood glucose estimation is to diagnose or to exclude or to monitor the anti-diabetic therapy. For blood gl

Which of the following statements is not true of mitosis, Which of the foll...

Which of the following statements is not true of mitosis? A. The original cell produces two identical daughter cells B. It follows duplication of DNA in the nucleus C. It involves

Theory of embryology -recapitulation theory / biogenetic law, RECAPITUL A ...

RECAPITUL A TIO N THEORY / BIOGENETIC LAW It was proposed by Muller & Haeckel on the basis of Baer's law. According to it, in the development of animal phylum characters

Experiment of stanley miller (1953) on the origin of life, What was the exp...

What was the experiment of Stanley Miller (1953) on the origin of life? In 1953 the Stanley Miller arranged an experimental apparatus that simulated the atmospheric conditions

Determine the long lasting vaccine against common cold, Why doesn't a long ...

Why doesn't a long lasting vaccine against common cold exist yet? Viruses that show a high mutation rate like the virus that causes the common cold escape simply from the actio

Explain the lactose fermenters and non lactose fermenters, Explain the Lact...

Explain the Lactose Fermenters and Non lactose Fermenters 1) Lactose Fermenters - These produce acid on lactose fermentation, which results in red colouration on bacterial colo

Explain sinus venosus defect with partial anomalous venous, Explain Sinus V...

Explain Sinus Venosus Defect with Partial Anomalous Venous Connection ? In this defect the atrial septal defect is situated just below the orifice of superior vena cava above

Poultry and duck diseases-avian adenovirus infections, Avian adenovirus inf...

Avian adenovirus infections EDS-76, an adenovirus, has been etiologically associated with drop in egg production. Other adenoviruses affecting chicken and other birds include

Define role of thiamin in the conversion carbohydrate to fat, Define the Ro...

Define the Role of Thiamin in the conversion carbohydrate to fats? Thiamin helps in the initial steps of fatty acid and sterol production. In this way, thiamin also helps co

Difference between diastolesystole and systole, Q. What is the difference b...

Q. What is the difference between diastoleSystole and systole and diastole are the two stages into which the cardiac cycle is divided Diastole is the stage of the cardiac cycle

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