Realization of p-d polarity of limb, Biology

Realization of P-D Polarity of Limb

Realization of P-D polarity of limb expressed in a specified proximo-distal sequence of differentiation of limb pans is controlled through the ( AER. Up to quite a late stage of '' limb bud development in chick embryo the AER can change the fate of mesodermal cells with respect to their ultimate position along the P-D axis as displayed by the following experiments:

1) While an additional AER is grafted on wing bud a duplicated set of distal wing structures is formed. It displays that under the influence of the additional AER a second P-D axis was created, regulation take place in the distal mesoderm so that what was normally destined to form one set of structures together one P-D axis now formed two sets, one along each P-D axis.

2) Distal half of the leg bud of stage 19 chick embryo was cut off and after that an AER was grafted on the remaining basal half of exposed mesoderm. A whole normal leg was formed. The basal half of mesoderm would have usually formed only the stylopodium parts, but under the inductive influence of AER regulation take place in its cells that gave rise to the various parts of all the three segments.

Posted Date: 1/30/2013 5:19:15 AM | Location : United States







Related Discussions:- Realization of p-d polarity of limb, Assignment Help, Ask Question on Realization of p-d polarity of limb, Get Answer, Expert's Help, Realization of p-d polarity of limb Discussions

Write discussion on Realization of p-d polarity of limb
Your posts are moderated
Related Questions
Median Sternotomy Approach :  The preferred approach these days is through a median sternotomy. Pericardiectoiny proceeds in the same way as done through left thoracotomy, by

KIDNE Y (RENAL FAILURE) - RF - Partial or total inability of kidney to carry excretory functions is called RF. It leads to uremia (excess of urea in blood), salt-water imba

The components of treatment of NKHDC are: 1) control of water loss. 2) control of sugar using insulin. 3) adjust electrolytes like sodium and potassium. 4) control infe

Ask question #Minimuwhat are the similarities between pisces and amphibians

Explain Ventricular Septal Defect in details ? Indications of surgery :  Some VSDs close spontaneously or become smaller in size. This has to be taken into consideratio

Plant Water Role of Water in Plants You know that water is the main constituent of plant cells. It performs the following major functions Water as a Solvent Water is a v

We are told that every surface we touch is teeming with bacterial cells, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why ar

Define Food Science as a Discipline and Modern Developments? As an undergraduate student you may have taken a course in food science and technology. Do you recall, what did the

Define Aerobic Exercise or Aerobic Energy System? To produce necessary energy, the body uses an aerobic pathway and an anaerobic pathway. Exercise that relies heavily on oxygen

Explain Cultivation of microorganisms It is for  the production of food colourants has attractions, these must be measured against the financial legislative and user constraint