So are the verses in the Book of Mormon on which this belief was based still there?
Some, but changes made in 1981 and 2010 to the Book of Mormon removed much of the language regard black or white skin.
2 Nephi 30:6 once read:
[T]heir scales of darkness shall begin to fall from their eyes; and many generations shall not pass away among them, save they shall be a white and a delightsome people.
In 1981 that verse was changed to read, in pertinent part:
a pure and a delightsome people
The words "skin of blackness" were removed from the introductory italicized summary in 2 Nephi, Chapter 5 in the online version of the Book of Mormon in December 2010.
Several other changes were made to footnotes and chapter summaries online.
Yes...they changed ONLY one verse in 1981...from “white and delightsome” to “fair and delightsome”...I guess joseph smith “mistranslated” the book of mormon if its unknown later editors needed to revise it
Yes.
2 Nephi 5: 21 ‘And he had caused the cursing to come upon them, yea, even a sore cursing, because of their iniquity. For behold, they had hardened their hearts against him, that they had become like unto a flint; wherefore, as they were white, and exceedingly fair and delightsome, that they might not be enticing unto my people, the Lord God did cause a skin of blackness to come upon them.’
Alma 3: 6 ‘And the skins of the Lamanites were dark, according to the mark which was set upon their fathers, which was a curse upon them because of their transgression and their rebellion against their brethren, who consisted of Nephi, Jacob and Joseph, and Sam, who were just and holy men.’