The GAP for RAS (called a RAS-GAP) works by inserting one of its arginine side chains into the Ras active site, thus stabilizing an intermediate in the

hydrolysis reaction.

TLS Online TPP Program

#Id: 9413

#XL - T Zoology

An individual without gonads will leave no genes to the next generation. Gonads and genitalia are called primary sexual traits.

Secondary sexual traits, which differ between the sexes but do not play a direct role in reproduction.

TLS Online TPP Program

#Id: 9414

#XL - T Zoology

TLS Online TPP Program

#Id: 9415

#XL - T Zoology

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

#XL - T Zoology

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

#XL - T Zoology

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

TLS Online TPP Program

#Id: 9418

#XL - T Zoology

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