from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring
Sorry, no etymologies found.
c. you do a "test-cross" (breed to a plant/animal that has a known genotype) en Español