Do men have one less rib than women?

No, men do not have one less rib than women.  To confirm this one would just have to count.  When God took the rib from Adam to make Eve He knew what He was doing (Genesis 2:21-22).  Modern science has discovered that the lower ribs have the ability to grow back as long as the rib sack is still there.  Also Adam’s DNA would not have been altered by such an operation and therefore his children would still carry the genetic markers for having all of their ribs.  The Bible shows us a clear knowledge of the human body, even in the places we least expect.