As the dominant allele can express her charcter in both homo as well as hetetozygous in condition the apperarce phenomenon of dominant genetic disorder is most frequence in the family history.
As the recesseive allele can express her character only in the homozygous in condition the appearce phenomenon of recessieve genetic disorder is very less in the family history.
This is the main basic distinguish point between the dominant and recessieve genetic disorder identification.
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