Ralph researcher studies transcription of his favorite gene, fave1, in bacteria. he notes that the wildtype strain of bacteria constantly expresses favorite-1 protein unless he the protein squash-1 is also expressed. when squash-1 is expressed, the level of favorite-1 protein decreases. one of his mutant strains continues to express favorite-1 protein regardless of whether squash-1 is present or not. what might be the regulatory mechanism of the gene coding for favorite-1 and what is the role of squash-1.