Those sets of chromosomes come from the varieties originally crossbred to create the clone.
Gene-spliced strains haven't gone through the same natural selection process as crossbred plants.
Or maybe hockey and chess blended with billiards and croquet, then crossbred with a really good scrub of the kitchen floor.
Multiple bear species, including polar bears and grizzlies, have been crossbred in zoos.
When these animals escaped and crossbred with feral swine, they created a tougher feral hog.
The history of crossbred cars is filled with hits and misses.
Data sets from individual breeds were combined, and records from crossbred cows were included.
Bulls from all breeds were mated to all three breeds of cows, producing three purebred groups, and six crossbred groups.
British Dictionary definitions for crossbred
crossbred
/ˈkrɒsˌbrɛd/
adjective
1.
(of plants or animals) produced as a result of crossbreeding
noun
2.
a crossbred plant or animal, esp an animal resulting from a cross between two pure breeds Compare grade (sense 9), purebred (sense 2)
crossbreed
/ˈkrɒsˌbriːd/
verb -breeds, -breeding, -bred
1.
Also interbreed. to breed (animals or plants) using parents of different races, varieties, breeds, etc
noun
2.
the offspring produced by such a breeding
crossbred in Science
crossbreed
(krôs'brēd') Verb To produce a hybrid animal or plant by breeding two animals or two plants of different species or varieties. For example, crossbreeding a male donkey with a female horse will produce a mule.
Noun An animal or a plant produced by breeding two animals or plants of different species or varieties; a hybrid.