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A
mating test to determine whether two different recessive mutations
(a1;a2) on opposite chromosomes (trans, a1+/+a2) of a diploid or partial
diploid will not complement (ie have a mutant phenotype) each other;
but the same two recessive mutations on the same chromosome (cis,
a1a2/++) in a diploid or partial diploid show a wild-type phenotype;
a test for allelism. A test to determine whether two mutant sites
are in the same functional unit or gene. |
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