construction of intraspecific cho x cho hybrids using electrophoretic mobility shift mutants with secondary , selectable drug-resistance markers allowed us to determine that mdh2 is not closely linked to any previously mapped hemizygous marker loci in cho , but is linked to alleles for two dizygous gene loci , pgm3 and aprt , on cho chromosome z7 .
C1708726
gene loci
C0008633
chromosome