In the direct line there are as many degrees as there are generations. Thus the son is, with regard to the father, in the first degree; the grandson in the second; and vice versa with regard to the father and grandfather toward the sons and grandsons.
Okla. Stat. tit. 84, § 220
Degrees in direct line
R.L. 1910, Sec. 8425
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.