OC are constitutive because repressor protein is unable to bind; this allows RNA polymerase to have unrestrained access to the promoter. 

TLS Online TPP Program

#Id: 9414

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 9415

#Unit 11. Evolution and Behavior

Lack the form of sex based on meiosis that is familiar from animals and plants, they exchange genes using a variety of mechanisms that together are called “parasexuality”

TLS Online TPP Program

#Id: 9416

#Unit 11. Evolution and Behavior

A trait can evolve by sexual selection if it increases a male’s overall fitness, even if it decreases survival.

Exaggerated secondary sexual traits are favored by sexual selection because they increase male mating success.

TLS Online TPP Program

#Id: 9417

#Unit 11. Evolution and Behavior

The second part of Darwin’s hypothesis is that exaggerated secondary sexual traits decrease survival.

TLS Online TPP Program

#Id: 9418

#Unit 11. Evolution and Behavior

Selection favors mating displays that maximize a male’s lifetime fitness.

TLS Online TPP Program

#Id: 9419

#Unit 11. Evolution and Behavior

Intersexual selection - Members of one sex, usually females, choose mates based on attractive characteristics such as color of plumage or sound of courtship song.