What is chargaffs rule in dna and rna

Here ya go ;) Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.