In a female population instead, whereas many will have a G6PD normal phenotype and very few (the square of the gene frequency in men) will have a fully G6PD deficient phenotype (as in males), quite a number (depending on the frequency of the G6PD deficiency gene(s) in that population) will have a phenotype which can aptly be called intermediate (≳30–≲80% of normal) (Fig. 2b). The gene discussed is G6PD; the disease is G6PD deficiency.