Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
This leads to the birth of Fry's father Yancy Sr., meaning that Fry is his own grandfather and Farnsworth's great (x31) grandfather.
Source: https://screenrant.com/futuramas-farnsworth-family-tree-explained/