`F_(1)` hybrid is intermediate between the two parents. The phenomenon is

The phenotype of F_(1) hybrid is intermediate expression of the two parents in

When two unrelated individuals or lines are crossed, the performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the perfomance of "F"_(1) hybrid is often superior to both its parents. This phenomenon is called:

When two unrelated individuals or lines are crossed, the perfomance of "F"_(1) hybrid is often superior to both its parents. This phenomenon is called:

When two unrelated individuals or lines are crossed, the perfomance of "F"_(1) hybrid is often superior to both its parents. This phenomenon is called: