Sexual dimorphism can evolve when selection favors the expression of a trait to be different in males and females. 

This situation is called sexually antagonistic selection, because an increase in the trait’s expression benefits one sex but harms the other.

TLS Online TPP Program

#Id: 2343

#Unit 3. Fundamental Processes

Promoters with sequences closer to the consensus are generally “stronger” than those that match less well

TLS Online TPP Program

#Id: 2344

#Unit 3. Fundamental Processes

consensus sequence of TATAAT in which the leading TA and the final T are highly conserved. Upstream sequences around position –35 also have a region of sequence similarity, TTGACA. 

TLS Online TPP Program

#Id: 2345

#Unit 3. Fundamental Processes

Core enzyme binds indiscriminately to any DNA. Sigma factor reduces the affinity for sequence independent binding and confers specificity for promoter.

TLS Online TPP Program

#Id: 2346

#Unit 3. Fundamental Processes

Sigma factor reduces the affinity for sequence independent binding and confers specificity for promoter.

TLS Online TPP Program

#Id: 2347

#Unit 3. Fundamental Processes

Sigma seems to stimulate both initiation and elongation.

TLS Online TPP Program

#Id: 2348

#Unit 3. Fundamental Processes

Transcription Is Initiated by RNA Polymerase without the Need for a Primer known as de novo synthesis