Referring to the number of nucleotides in BRCA1/2 as n, what happens if I develop a test that checks (1) if nucleotides 1->3n/4 of BRCA1/2 are present (2) if nu

Referring to the number of nucleotides in BRCA1/2 as n, what happens if I develop a test that checks (1) if nucleotides 1->3n/4 of BRCA1/2 are present (2) if nucleotides n/4->n of BRCA1/2 are present (3) if the substrings in (1) and (2) are "properly overlapping". Given this information, I can perform their test without ever "creating" (i.e. isolating) their patented "gene".