The Zombie gene produces 2 proteins, the first protein includes all domains encoded in its 3 exons. The second protein is missing a DNA binding domain encoded by the second exon. How are these proteins most likely produced?

Alternative splicing.

Explanation:

Alternative splicing is a mechanism that enables one gene to produce more than one protein. This occurs when different combinations of exons from the same gene are transcribed into mRNA. In this case, alternative splicing caused the second exon (and the DNA binding domain it encoded) to be excluded from the second protein.