a person in the record
Guido Pontecorvo
Italian geneticist1907 to 1999
Wikidata names Hermann Joseph Muller as doctoral advisor, lists 1 doctoral student, and names Enrico Avanzi as teacher. Linked to Wikidata, Wikipedia, and 4 other registers.

How to read the markscited by a repository's recordstated by Wikidata or indexed by OpenAlexclaimed on an ORCID list, or inferred
Advisors on Wikidata1
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
Students on Wikidata1
From Wikidata, shown separately from the thesis records.
- stated by Wikidataborn 1932
Teachers and mentors1
Wikidata's "student of" and "student" statements: a line of training beside the lineage, never a thesis supervision and never counted with one.
- a teacher or mentor, stated by Wikidata: not a thesis supervision
The line above and below2 steps
The advisors of their advisors, four steps up at most, in the thesis records and on Wikidata, each kind marked; a person in both is listed once.
- 1 step up
stated by WikidataHermann Joseph Muller
- 2 steps up
stated by WikidataThomas Hunt Morgan
Below them, within 3 steps, the record reaches 1 person: 1 stated by Wikidata.