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TLS Online TPP Program

#Id: 370


Linking number is topological property which is expressed as  Total No. of Base Pair/Base pair per turn.

#Unit 2. Cellular Organization #DNA Supercoiling #Part B Pointers
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TLS Online TPP Program

#Id: 1592

#Unit 5. Developmental Biology

A regional thickening of cells at the anterior end of the primitive streak


TLS Online TPP Program

#Id: 1593

#Unit 5. Developmental Biology

Hensen’s node is the functional equivalent of the organizer (dorsal lip of the amphibian blastopore)

TLS Online TPP Program

#Id: 1594

#Unit 5. Developmental Biology

Primitive Pit 
A funnel-shaped depression at the center of Hensen’s node through which cells migrate to form the notochord and prechordal plate.

TLS Online TPP Program

#Id: 1595

#Unit 5. Developmental Biology

The primitive streak defines the major body axes of the avian embryo. 

TLS Online TPP Program

#Id: 1596

#Unit 5. Developmental Biology

The axis of the primitive streak is equivalent to the dorsal-ventral axis of amphibians.

TLS Online TPP Program

#Id: 1597

#Unit 5. Developmental Biology

Mediolateral intercalation in the formation of the primitive streak (Cellular Dance Mechanism) cells came down the sides of the epiblast to undergo a medially directed intercalation of cells in the posterior margin


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