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While working with a series of yeast loss of function mutants, you perform a complementation test by mating each haploid yeast mutant with every other (mutants are labeled A-E) as well as mating them with wild-type (WT) haploid. The results of testing the resulting diploids are as follows: a plus mark indicates there was complementation, and a minus mark means there was no complementation.

WT A B C D E
WT + + - + + +
A + - - - + +
B - - - - - -
C + - - - + +
D + + - + - -
E + + - + - -
The mutant that stands out as unusual is mutant
Select Option ABCDE
. The other four mutants fall into two complementation groups. Listed alphabetically, they are
Select Option ABACADAEBCBDBECDDE
and
Select Option ABACADAEBCBDBECDCEDE
. The purpose of mating the mutants to the wild-type is to allow you to determine if the mutants are
Select Option dominantlethalnon-mendelian
. The unusual mutant in the first dropdown would be best described as
Select Option dominant mutationdominant negativerecessive mutationrecessive negative
.
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