Mentioning previous answers is intended to be a starting point, not to discourage more discussion. Follow-on questions, data, and debate is welcome.

I don't see a full answer, but the picture is moderately clear from the parts here.

As in "Did the Nazis treat Christian Jews differently?" at https://www.reddit.com/r/AskHistorians/comments/7tuvw8/did_the_nazis_treat_christian_jews_differently/ , kieslowskifan provided a lot of details in the course of an overview.

/u/Aleksx000 replied to "If Jews converted to Christianity in Nazi Germany then were they still persecuted? How exactly did the government determine who was Jewish or not?" in https://www.reddit.com/r/AskHistorians/comments/871tzc/if_jews_converted_to_christianity_in_nazi_germany/dw9kcx8/ The answer appears to apply to Germany (original edition, not the extended dictator's cut). They went into more details than kieslowskifan about exact aspects of mixed status.

In "Out of curiosity, what would have happened to my family during the Nazi rule?" at https://www.reddit.com/r/AskHistorians/comments/82761k/out_of_curiosity_what_would_have_happened_to_my/ , /u/QuickSpore covered the case of a mixed-race marriage in Germany a bit more than the previous two. It varied by time.

"How did nazis identify who was Jewish or not?" at https://www.reddit.com/r/AskHistorians/comments/2wj741/how_did_nazis_identify_who_was_jewish_or_not/ : [deleted] assembled a mini-FAQ thing on Jewish identification. See especially 'What kept Jews from "Blending In" during WWII?'.

"How were Jews identified by Nazis? What happens if a Jew didn't wear the Star of David while walking on the streets in a Nazi-occupied town/city?" at https://www.reddit.com/r/AskHistorians/comments/3w7t6a/how_were_jews_identified_by_nazis_what_happens_if/ , ArjanB and commiespaceinvader wrote about local civic records, Jew community records, and local informants.