1. Interracial relationships/interracial sex would be forbidden. One of the Nuremberg Codes was "German Blood and German Honour," basically they didn't want any Germans to become intimate with a Jew or allow them to marry. If that law was imposed on my culture today, my parents would be breaking the law since they are interracial and had 2 children. My race would not be treated the same as everyone else. We wouldn't be able to have a relationship outside of our race.
2. We would not be considered citizens. The second Nuremberg Code was the "Reich Citizenship Law." Only those of German or related blood were permitted to be Reich Citizens. If that law was imposed on my culture then most of us wouldn't be citizens. In America people who aren't citizens still have to pay taxes and of course obey the law. Citizen ship means that you have the right to vote, the right to hold government offices, and the right to collect unemployment insurance payments (etc.) We would not be allowed to do any of that.