After you have identified the physiological transcription start site by S1 mapping or primer extension you can use run-off transcription in vitro.

TLS Online TPP Program

#Id: 9430

#Unit 11. Evolution and Behavior

Bateman’s principle

In most cases, it is the male’s secondary sexual traits that are exaggerated.

This shows that sexual selection is more common and intense on males than females

TLS Online TPP Program

#Id: 9431

#Unit 11. Evolution and Behavior

Bateman put several males and females together in bottles for several days. 

He concluded that the number of offspring sired by a male increased in proportion to the number of females he mated.

In contrast, the number of offspring produced by a female did not increase with the number of males she mated.

TLS Online TPP Program

#Id: 9432

#Unit 11. Evolution and Behavior

The outcome of sexual selection is strongly influenced by the operational sex ratio

TLS Online TPP Program

#Id: 9433

#Unit 11. Evolution and Behavior

Mate choice and benefit

Mate choice increase the reproductive success.

Mate choice is result of sexual selection.

TLS Online TPP Program

#Id: 9434

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 9435

#Unit 11. Evolution and Behavior

Monogamy

Each individual mates exclusively with one partner over at least a single breeding cycle and sometimes for longer.

Monogamy occurs in fish, amphibians, reptiles, and mammals, but it is only commonly observed in birds, some rodents, and a few primate species.