Question

Describe the development of chick upto the formation of three germinal layers

Answer 1

Solution :-

When spermatozoon fertilize the egg, streaming movements are originated within the egg and these leads to distribution of materials.

in order that 3 regions is seen, the higher animal hemisphere (pole) that is pigmented and lower white vegetal pole.

Between the 2 hemispheres, there's alittle are with no pigment known as gray crescent.

● Development of frog -

Embryological development of frog takes regarding 12-16 weeks.

Gastrulation is development of 3 primary germ layers - entoblast, germ layer & germ layer.

During this method, hollow embryo develops into -

• endoderm - inner layer of cells

• mesoderm - middle layer of cells

• ectoderm - outer layer of cells

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@GauravSaxena01