You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

What is the maximum number of genes that these 20 mutants could represent?

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#Question id: 2294

#SCPH01 Biochemistry

________ use such high magnification that even atoms are discernable.

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#Question id: 18376

#SCPH01 Biochemistry

Increase in iron content of the plants treated with B. subtilis volatiles is correlated with 

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#Question id: 4738

#SCPH01 Biochemistry

Red kernel color in wheat results from the presence of at least one dominant allele of each of two independently segregating genes . Kernels on rr bb plants are white, and the genotypes R— bb and rr B— result in brown kernel color. Suppose that plants of a variety that is true breeding for red kernels are crossed with plants true breeding for white kernels produced F1 were allowed to selfing .what are F2 phenotype ratio ?

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#Question id: 4721

#SCPH28 | Zoology

PKU, results from a recessive allele; persons homozygous for this allele, if untreated, exhibit mental retardation, blue eyes, and light skin color. This character categorized as

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#Question id: 19379

#SCPH01 Biochemistry

The killing action of glyphosate results primarily from ________ the cells of aromatic amino acids