6402. Except as provided in Section 6402.5, the part of the
intestate estate not passing to the surviving spouse or surviving
domestic partner, as defined in subdivision (b) of Section 37, under
Section 6401, or the entire intestate estate if there is no surviving
spouse or domestic partner, passes as follows:
(a) To the issue of the decedent, the issue taking equally if they
are all of the same degree of kinship to the decedent, but if of
unequal degree those of more remote degree take in the manner
provided in Section 240.
(b) If there is no surviving issue, to the decedent's parent or
parents equally.
(c) If there is no surviving issue or parent, to the issue of the
parents or either of them, the issue taking equally if they are all
of the same degree of kinship to the decedent, but if of unequal
degree those of more remote degree take in the manner provided in
Section 240.