Theory of embryology - gradient theory, Biology

Assignment Help:

GRADIENT THEORY -

It was given by T. Boveri & was supported by M.C. Child.

Child called it as metabolic axial gradient theory.

According to it, the egg has distinct animal & vegital poles.

The cytoplasm of the animal pole divides repidly but the rate of cleavage in the vegital pole is slow. It indicates that the rate of metabolism is more in the animal pole than the vegital pole which is called as metabolic axial gradient.

Horstadius & Runnstrom called it as double gradient thoery. They explain egg development on the basis of animal pole gradient & vegital pole gradient.


Related Discussions:- Theory of embryology - gradient theory

Light microscopy, Light microscopy: Microscopy started with light micr...

Light microscopy: Microscopy started with light microscopes using visible light to illuminate the objects, the most used and familiar microscope is called compound light micro

Complications of short bowel syndrome, Q. Complications of short bowel synd...

Q. Complications of short bowel syndrome? Complications of short bowel syndrome are generally related to malnutrition. What are the complications of malnutrition? A person with

Explain about the colour sense, Explain about the Colour Sense Colour S...

Explain about the Colour Sense Colour Sense  is  the faculty whereby we are enabled  to  distinguish colours as  excited by  light of  different wave  length. The ability  to a

Organisms contain enzymes, Some organisms contain enzymes that condense a f...

Some organisms contain enzymes that condense a fatty alcohol and a fatty acid to generate wax esters. Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester gen

Mitochondria, Mitochondria Mitochondria are commonly known as the "pow...

Mitochondria Mitochondria are commonly known as the "power house" of cells. These are the distinct organelles of all eucaryotic cells, plants, fungi and some protists. In the

Use of gloves as personal protective equipment, Q. Use of Gloves as persona...

Q. Use of Gloves as personal protective equipment? Gloves are task specific. The different types of gloves worn in the dental office are: i) Examination gloves ii) Over o

Cell division., sir i''m not understanding cell division rightly. in ca...

sir i''m not understanding cell division rightly. in case of meiosis both paternal and maternal chromosome goes in two cell separately while in case of mitosis they go alongwit

Experiment supported by nasa , An experiment supported by NASA calculated t...

An experiment supported by NASA calculated the heights of 6 men rapidly before going to bed, and then again after 3 days of bed rest. The data were as follows: What is the 95% con

Define advantages of using yeast as a source of protein, Define Advantages ...

Define Advantages of using Yeast as a source of Protein? 1. Large size, hence separation from the culture medium is easy. 2. As the pH of the growth is towards acidic side,

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