Formation of notochord and somites, Biology

Assignment Help:

Formation of Notochord and Somites

The formation of notochord and somites from the transplanted dorsal lip was supposed; these are normally derived from cells of the dorsal lip. Even the formation of gut could be explained because the process of involution of the transplanted dorsal lip would produce a secondary archenteron. But the most surprising feature was the formation of neural tube that is not a derivative of dorsal mesoderm (a tissue that differentiates from cells of the dorsal lip) but is formed from ectodermal cells. Microscopic examination had displayedthat the neural tube had developed from the non-pigmented cells of the host ectoderm that were otherwise destined to develop into belly skin. Based upon these results. Spemann concluded that the dorsal lip material had induced the overlying prospective epidermal ectoderm to become neural tissue. During gastrulation involution of chordarnesodermal (dorsal lip) brings this mesoderm into contact with the overlying ectoderm . This contact induces the ectoderm thatnow becomes determined to develop into neural tissue. The other regions of the ectoderm that do not come into contact with the chord mesoderm develop into epidermis and its derivatives.


Related Discussions:- Formation of notochord and somites

Symmetry system characterized in echinoderms, Q. How are the nervous and th...

Q. How are the nervous and the symmetry system characterized in echinoderms? Adult echinoderms, along with cnidarians, are the animals that present radial symmetry that is thei

Controlling expression of a number of genes in e, he Lac Repressor protein,...

he Lac Repressor protein, which we will talk about a bit later in the course, is important for controlling expression of a number of genes in E. coli. There are about 10 copies of

Define about calcium and osteoporosis, Define about Calcium and Osteoporosi...

Define about Calcium and Osteoporosis? Gain in bone mass occurs throughout childhood; however, during adolescent growth spurt, the gain in bone mass, as well as, calcium retent

Explain the term of measurement of height in veous pressure, Explain the te...

Explain the term of measurement of height in veous pressure? Measurement of Height: Measurement of height of venous pressure is done from the sternal angle of Louis verticall

Hypoglycaemia unawareness, Hypoglycaemia Unawareness ? Some people ...

Hypoglycaemia Unawareness ? Some people with diabetes do not have early warning signs of low blood glucose, a condition called hypoglycemia unawareness. ? This conditio

Explain about utility gloves, Q. Explain about Utility Gloves? Because ...

Q. Explain about Utility Gloves? Because of the increased risk of percutaneous injury during instrument cleaning (100% of the Faculty incidents reported in academic year 2003/0

Explain antigens, Explain Antigens ? A blood type, or group, is based ...

Explain Antigens ? A blood type, or group, is based upon the presence or absence of certain substances called antigens on the surface of the red blood cells. Antigens are subs

Factors that limit the reproductive potential, Organisms are made to compet...

Organisms are made to compete for their needs from the environment. The competition as we pointed earlier could be for the food and territory, to overcome the adverse climatic cond

Forebrain - cerebrum, CEREBRU M - Largest part of brain. 2/3 of bra...

CEREBRU M - Largest part of brain. 2/3 of brain. 4/5 of brain's weight. Cerebrum is devided into 2 cerebral hemispheres by longitudinal cerebral fissure. Gyri and sul

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