It is a foolish claim, (though many modern Christians make it) to believe the New Testament without also believing the Old Testament, including Genesis. Christ Himself accepted the Pentateuch as literal and inspired history. Thus, to reject the Genesis accounts of creation and the Flood, for example, is tantamount to rejecting Christ as the omniscient Son of God.

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8