Neurotrophins 

Necessary for survival and growth of neurons

In the CNS produced by astrocytes

TLS Online TPP Program

#Id: 1905

#Unit 4. Cell Communication and Cell Signaling

Surface protein on B cell

CR2(CR21)

CD19

TAPA-1(CD81)

 mIg

Igα/ Igβ

(CD79a and CD79B)

 TLR

CD40

B7 (CD80/86)

ICAM-1

MHC-1 and 2

CD 22

TLS Online TPP Program

#Id: 9183

#Unit 11. Evolution and Behavior

The selection gradient measures the strength of directional selection acting on a quantitative trait.

TLS Online TPP Program

#Id: 9203

#Unit 11. Evolution and Behavior

Balance natural selection

Balancing selection is a type of natural selection that maintains genetic diversity in a population.

In balancing selection, two or more alleles are kept in balance, and therefore are  maintained in a population over the course of many generations.

TLS Online TPP Program

#Id: 6269

#Unit 8. Inheritance Biology

Supplementary gene interaction (9:3:4)

Glume colour in millets

          P                                   Q

X                         Y                                   Z

Brown               purple                   red

TLS Online TPP Program

#Id: 9908

#Unit 4. Cell Communication and Cell Signaling

Inflammatory response