Final answer:
The "domain-swapping" experiment that grafts the Gal4 DNA-binding domain to the Lexa activation domain generates a chimeric protein that can activate transcription of the Gal7 gene.
Step-by-step explanation:
The "domain-swapping" experiment that grafts the Gal4 DNA-binding domain to the Lexa activation domain generates a chimeric protein that can activate transcription of the Gal7 gene. This is because the Gal4 DNA-binding domain allows the chimeric protein to bind to the Gal4 site on the promoter of the Gal7 gene, leading to the activation of transcription.