NOUN
- 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
How To Use testcross In A Sentence
- Sixty-one triploid F 1 plants were crossed with diploid pollen donors for testcrosses.
- If the mystery mutant and the known mutant sit on different chromosomes or a long way from each other on the same chromosome the grandkids of your ‘testcross’ will have an even mix of either one of the mutations, both or neither. Balloon Juice » 2006 » March