Kоk et аl., 2015 fоund thаt а mоrpholino targeting the megamind gene led to a swollen head phenotype in both wild type and megamind mutant zebrafish (panels E and F) where the entire gene was deleted via TALENs (panel A). Whereas the megamind mutant alone did not exhibit this phenotype and instead appeared outwardly wild type (panels C and D). Which of the following conclusions are most logical given the information shown here?