Fate map - gastrulation in chick, Biology

Assignment Help:

Fate Map - Gastrulation in Chick

All the three main germinal layers (ectoderm, mesoderm, endoderm) are made from cells initially located in the epiblast in area pellucida, hence, the entire body of chick and most parts of the extra-embryonic membranes (yolk sac, amnion, chorion, allantois) are developed from cells derived from the epiblast. Therefore, the fate maps constructed for the blastoderm of chick embryo consider to the several presumptive organ making areas in the epiblast only. This map is based on the results of a number of studies by dissimilar workers by using a variety of in ovo and in vitro techniques involving staining with vital dyes, marking with carbon particles, labelling along with tritiated thymidine and subsequent autoradiography, grafting and transplantation of specific areas etc. The map displays the location and the extent of different areas in the blastoderm (epiblast) from where the presumptive cells are derived for the three germinal layers:

  1. Ectoderm (involving epidermal, neural and extra-embryonic ectoderm)
  2. Mesoderm (involving mesoderm for notochord, head, somites, lateral plate and extra-embryonic mesoderm) and
  3. Endoderm (involving gut and extra-embryonic yolk sac endoderm).

As a result of morphogenetic movements during gastrulation the cells from the several areas reach their respective specific destinations making the ectoderm on the surface, endoderm below and mesoderm among the two.


Related Discussions:- Fate map - gastrulation in chick

Bluetongue, B l u e t on g u e Bluetongue (BT) is a non-contagi...

B l u e t on g u e Bluetongue (BT) is a non-contagious and arboviral disease of both domestic and wild ruminants. The disease is enzootic in areas where reservoirs (cat

Exchange list vs. food composition tables for menu planning, Define Exchang...

Define Exchange list vs. Food composition tables for menu planning? A dietician is frequently expected to make quick, yet reasonably accurate estimation of the nutritive value

Electrocardiography, ECG: Myocardial ischemia is indicated by T-wave invers...

ECG: Myocardial ischemia is indicated by T-wave inversions. Left ventricular hypertrophy (LVH) criteria: R in aVL >13 mm R voltage in L1+ S III >25 mm S v1 + R v5 or v6

Bioprosthetic valves, Bioprosthetic Valves :  The risk of thromoboembolism...

Bioprosthetic Valves :  The risk of thromoboembolism is limited to the first three months, until the sewing ring gets endothelialised. The recommendation is to have less intense r

Errors in fertilization, ERRORS IN FERTILIZATION  - 1.       Polyspe...

ERRORS IN FERTILIZATION  - 1.       Polyspermy - When more than one sperms are fused in an ovum, this condition is called polyspermy. 2.       Polygynae - During oogen

Adrenal medulla, ADRENA L MEDULLA The adrenal medulla develops from th...

ADRENA L MEDULLA The adrenal medulla develops from the neuroectoderm of the embryo. Medulla consists of chromaffin cells or phaeochromocytes. These cells are connected wi

Biological species concept, The biologicaI species concept claims that spec...

The biologicaI species concept claims that species consist of natural populations and that species are real and objective. They are not man-made subjective abstraction. According

What is the significance of lignin for the xylem formation, What is the sig...

What is the significance of lignin for the xylem formation? Lignin is vital because it is deposited on the cell wall of the xylem cells providing impermeability and rigidity to

How vaginal infections cause, How Vaginal infections cause Sulfonamide ...

How Vaginal infections cause Sulfonamide creams, other ''broad-spectrum'' vaginal preparations, and currently available preparations of Lactobacillus  species or dairy products

Define the properties of fibre, Define the Properties of Fibre? The str...

Define the Properties of Fibre? The structural make up of fibre influences its properties which in turn affects the physiologic and metabolic roles. This is well-depicted in th

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