Yes!!! genotype have an effect on mobility as explained by an
example of hemoglobin chains.
The hemoglobin chains shows different electrophoretic mobility in
individuals with different genotypes such as wrt S and A
alleles.
The Glu→Val substitution causes a charge difference between Hb-A
and Hb-S so causes the mobility of the molecule in an electric
field
The SS and AA homozygous genotypes produces a single band even then
shows different electrophoretic mobility.
The electrophoretic phenotype of AS heterozygotes is the sum of the
phenotypes of the two homozygotes. So the phenotype produced with
each allele in homozygous conditions is fully expressed in the
heterozygote condition as well. So A and S alleles are
codominant.
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