Is tetracycline tooth discoloration inheritable?

No: No. You only get the discoloration if you take tetracycline during tooth formation.

No: Tetracycline only damages tooth enamel if taken while the crown of the tooth is forming. That means from about 3 months in utero (if mother takes tetracycline) until about age 9, when all the permanent tooth crowns, including the a2 year molars, have formed.

Is not genetic: The antibiotics tetracycline and doxycycline are known to discolor permanent teeth when given to children whose teeth are still developing before age 10.

No: Tetracycline tooth discoloration is caused by an antibiotic, not by your genes.