The prophets of the Book of Mormon definitely teach that all mankind will be resurrected from the dead. One of the best descriptions of this resurrected body is provided by Alma wherein he states: “the soul shall be restored to the body, and the body to the soul; yea, and every limb and joint shall be restored to its body; yea, even a hair of the head shall not be lost; but all things shall be restored to their proper and perfect frame.” (Alma 40:23.)
The prophets of this dispensation have also taught that the actual, physical body will be resurrected and, through the law of restoration, will essentially become perfect. The Prophet Joseph Smith taught the following concerning the resurrected body:
As concerning the resurrection, I will merely say that all men will come from the grave as they lie down, whether old or young; there will not be “added unto their stature one cubit,” neither taken from it; all will be raised by the power of God, having spirit in their bodies, and not blood. Children will be enthroned in the presence of God and the Lamb with bodies of the same stature that they had on earth, having been redeemed by the blood of the Lamb; they will there enjoy the fulness of that light, glory and intelligence, which is prepared in the celestial kingdom. “Blessed are the dead who die in the Lord, for they rest from their labors and their works do follow them.” [Revelation 14:13.] (History of the Church, 4:555-56.)
Concerning the process of restoring a body to a state of perfection in the resurrection, President Joseph F. Smith has written:
The death that came by the fall of our first parents is eradicated by the resurrection of the Son of God, and you and I cannot help it. You will come forth from your graves, these same mortal bodies as they are now, bearing the marks just as much as Christ’s body bore the marks that were upon him. They will come forth from their graves, but they will be immediately immortalized, restored to their perfect frame, limb and joint. And the poor, unfortunate creature who has lost a leg or an arm or a finger will have it restored to its proper frame, every joint to its place, and every part to its part, and it will be made perfect (Alma 40:23), for that is the law of restoration that God has instituted by which His own purpose cannot fail, by which his own designs concerning His children must be consummated. Now this is the restoration I believe in… . What is more desirable than that we should meet with our fathers and our mothers, with our brethren and our sisters, with our wives and our children, with our beloved associates and kindred in the spirit world, knowing each other, identifying each other by the marks we knew in the flesh and by the associations that familiarize each to the other in mortal life? What do you want better than that? What is there for any religion superior to that? I know of nothing… . (Doxey, The Latter-day Prophets and the Doctrine and Covenants [Deseret Book Co., 1963], 3:168.)
Melvin J. Ballard has also provided a description of the resurrected body:
The fact of the resurrection does not depend upon a man’s belief or unbelief. It is a fact, whether he believes it or not. But man’s state in the resurrection is established by himself; hence the part we can play in planning a glorious resurrection. He has laid down terms by which he will return this house to us not as it was, old and decrepit, but strong, and vigorous and beautiful, for I believe with the prophets, that in the resurrection from the dead, whether it shall take place immediately at the resurrection or thereafter when the restitution of all things comes, there will be no maimed or crippled bodies. (Alma 40:23.)When you see men and women in the resurrection, we shall see them in the very bloom of their glorious manhood and womanhood, and he has promised all who would keep his commandments and obey the gospel of the Lord Jesus Christ, the restoration of their houses, glorified, immortalized, celestialized, fitted to dwell in the presence of God.
To those who cannot subscribe to those terms, and yet obey others, the lesser law, Jesus has promised a terrestrial body, not so glorious, and yet immortal and eternal, and still to those who cannot do so much, but only obey in part, a telestial body suited to the kingdom in which they dwell. Thus we fix our status in that resurrection, though the resurrection is a fact without our action. Our action makes it either glorious—the resurrection of the just; or the resurrection of the unjust. (Sermons and Missionary Services of Melvin J. Ballard [Deseret Book Co., 1949], p. 186.)
President Joseph Fielding Smith also indicated that in the resurrection all things will be restored to their proper and perfect frame:
A little sound thinking will reveal to us that it would be inconsistent for our bodies to be raised with all kinds of imperfections. Some men have been burned at the stake for the sake of truth. Some have been beheaded, and others have had their bodies torn asunder; for example, John the Baptist was beheaded and received his resurrection at the time of the resurrection of our Redeemer. It is impossible for us to think of him coming forth from the dead holding his head in his hands; our reason says he was physically complete in the resurrection. He appeared to the Prophet Joseph Smith and Oliver Cowdery with a perfect resurrected body.When we come forth from the dead, our spirits and bodies will be reunited inseparably, never again to be divided, and they will then be assigned to the kingdom to which they belong. All deformities and imperfections will be removed, and the body will conform to the likeness of the spirit, for the Lord revealed, “that which is spiritual being in the likeness of that which is temporal; and that which is temporal in the likeness of that which is spiritual; the spirit of man in the likeness of his person, as also the spirit of the beast, and every other creature which God has created.” (D&C 77:2.) (Doctrines of Salvation, 2:289.)