Nonselectable Mutant Example非选择性突变株 (b) 2012 Pearson Education.Inc. Pigmented mutants and nonpigmented mutants of Aspergillus.The wildtype has a green pigment.The white mutants make no pigment, whereas the yellow mutants cannot convert the pigment to the normal color.Chen Feng, Shanghai Jiao Tong Univerity Nonselectable Mutant Example非选择性突变株 Pigmented mutants and nonpigmented mutants of Aspergillus. The wildtype has a green pigment. The white mutants make no pigment, whereas the yellow mutants cannot convert the pigment to the normal color