Wordnet 3.0
NOUN (1)
1.
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;
[syn: testcross, test-cross]
WordNet (r) 3.0 (2006):
test-cross
n 1: 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 [syn: testcross,
test-cross]