"polymorphism" - Color Atlas of Genetics, - Eberhard Passarge

Genetic polymorphism is the existence of variants
with respect to a gene locus (alleles), a
chromosome structure (e.g., size of centromeric
heterochromatin), a gene product (variants in
enzymatic activity or binding affinity), or a
phenotype. The term DNA polymorphism refers
to a wide range of variations in nucleotide base
composition, length of nucleotide repeats, or
single nucleotide variants. DNA polymorphisms
are important as genetic markers to identify
and distinguish alleles at a gene locus and to determine
their parental origin.

"DNA polimorphism" - Color Atlas of Genetics, Eberhard Passarge

Genetic polymorphism is the existence of variants
with respect to a gene locus (alleles), a
chromosome structure (e.g., size of centromeric
heterochromatin), a gene product (variants in
enzymatic activity or binding affinity), or a
phenotype. The term DNA polymorphism refers
to a wide range of variations in nucleotide base
composition, length of nucleotide repeats, or
single nucleotide variants. DNA polymorphisms
are important as genetic markers to identify
and distinguish alleles at a gene locus and to determine
their parental origin.