Related to this is a new area of interest, in reproductive isolation.

Given sufficient time, these variations may lead to reproductive isolation.

He maintained that factors such as reproductive isolation had to be taken into account.

But, scientists have long wondered, how quickly can reproductive isolation evolve?

Thus, secondary contact does not always result in total reproductive isolation, as has often been predicted.

Eventually, if reproductive isolation is achieved, it may lead to a separate species.

This preference could result in reproductive isolation if two populations came into contact again.

Reinforcement is the process by which natural selection increases reproductive isolation.

This sort of reproductive isolation isn't just theory; it's been demonstrated in the lab.

Once this type of reproductive isolation occurs, the two populations can be considered separate species.

If their reproductive isolation was complete, then they will have already developed into two separate incompatible species.

He thought of species as maintained by reproductive isolation.

This would contribute to the reproductive isolation of the two incipient species.

This led to reproductive isolation, an example of ecological speciation.

Many of these rapid changes may contribute to reproductive isolation and speciation.

In 2008 a speciation gene causing reproductive isolation was reported.

The mechanisms of reproductive isolation have been classified in a number of ways.

Traits associated with reproduction evolve playing an essential role in reproductive isolation.

The two ecotypes will eventually become separate species once reproductive isolation is achieved.

Species recognition traits play a central role in both the origin and maintenance of reproductive isolation.

After 25 generations of this mating test, it showed reproductive isolation between the two strains.

How many genes cause reproductive isolation between species?

These discoveries allowed certain assumptions to be made regarding the origin of reproductive isolation mechanisms in nature.

It is evident that selection against the hybrids was very effective in increasing reproductive isolation between these species.

The extent of their reproductive isolation is debated.