Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A cross between an individual exhibiting the dominant phenotype of a trait and an individual that is homozygous recessive for that trait in order to determine the genotype of the dominant individual.
- transitive verb To subject to a testcross.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- 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
Etymologies
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Examples
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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.
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