What term describes breeding between two genetically unrelated organisms to produce a new hybrid?

The correct term that describes breeding between two genetically unrelated organisms to produce a new hybrid is hybridization. This process involves the crossing of different species or varieties that are genetically distinct, resulting in offspring that inherit traits from both parent organisms. Hybridization is a common method used in agriculture and horticulture to develop new varieties with desirable characteristics, such as disease resistance or improved yield.

In contrast, pure strain refers to a line or breed of organisms where the genetic traits have been maintained without introduction of unrelated genetic material. Interbreeding typically refers to mating within a species or population, where genetic material is exchanged between related individuals rather than unrelated ones. Amniocentesis is a medical procedure used to obtain amniotic fluid for genetic testing during pregnancy and does not pertain to the breeding of organisms.