302 CERTIFICATION

                                                                    EXHIBIT 31.1


                                 CERTIFICATIONS

           I, Robin Hutchison, certify that:


          1. I have reviewed this quarterly report on Form 10-QSB/A of Applied
     DNA Science, Inc.;

          2. Based on my knowledge, this report does not contain any untrue
    statement of a material fact or omit to state a material fact necessary to
    make the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered by
    this report;

          3. Based on my knowledge, the financial statements, and other
    financial information included in this report, fairly present in all
    material respects the financial condition, results of operations and cash
    flows of the registrant as of, and for, the periods presented in this
    report;

          4. The registrant's other certifying officer and I are responsible for
    establishing and maintaining disclosure controls and procedures (as defined
    in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

             (a) Designed such disclosure controls and procedures, or caused
       such disclosure controls and procedures to be designed under our
       supervision, to ensure that material information relating to the
       registrant, including its consolidated subsidiaries, is made known to us
       by others within those entities, particularly during the period in which
       this report is being prepared;

             (b) [Omitted pursuant to SEC Release No. 33-8238];

             (c) Evaluated the effectiveness of the registrant's disclosure
       controls and procedures and presented in this report our conclusions
       about the effectiveness of the disclosure controls and procedures, as of
       the end of the period covered by this report based on such evaluation;
       and

             (d) Disclosed in this report any change in the registrant's
       internal control over financial reporting that occurred during the
       registrant's most recent fiscal quarter (the registrant's fourth fiscal
       quarter in the case of an annual report) that has materially affected, or
       is reasonably likely to materially affect, the registrant's internal
       control over financial reporting; and

          5. The registrant's other certifying officer and I have disclosed,
    based on our most recent evaluation of internal control over financial
    reporting, to the registrant's auditors and the audit committee of the
    registrant's board of directors (or persons performing the equivalent
    functions):

             (a) All significant deficiencies and material weaknesses in the
       design or operation of internal control over financial reporting which
       are reasonably likely to adversely affect the registrant's ability to
       record, process, summarize and report financial information; and

             (b) Any fraud, whether or not material, that involves management or
       other employees who have a significant role in the registrant's internal
       control over financial reporting.


 /s/ Rob Hutchison
     -------------
     Rob Hutchison
     Chief Executive Officer

Date:   May 21, 2004