Joseph Smith was a bit confused about the relationship between Jesus and his father.
He saw the two of them together in his very first vision. Here's how he described it:
I retired to a secret place in a grove and began to call upon the Lord, while fervently engaged in supplication my mind was taken away from the objects with which I was surrounded, and I was enwrapped in a heavenly vision and saw two glorious personages who exactly resembled each other in features, and likeness, surrounded with a brilliant light which eclipsed the sun at noon-day. (Times and Seasons, Volume 3, pp.706-7)
And although in this account, the identical-looking "glorious personages" were not identified by name, he named them in another account.
I saw two Personages, whose brightness and glory defy all description, standing above me in the air. One of them spake unto me, calling me by name and said, pointing to the other—This is My Beloved Son. Hear Him! (Joseph Smith-History, 1:17)
Here's a picture that someone took of the event.
(I'm not sure, but I think Jesus is on the left and his dad is on right, since the guy on the right seems to be pointing at the other guy. But you should ask a Mormon, just to be sure.)
So Jesus and his father are, or at least look like, identical twins.
Or maybe they they are the same person. That's why they appear identical, just like the Book of Mormon repeatedly and clearly states.
Here are the verses that I've found so far that say that Jesus is his own father, but let me know if I missed any.
- He shall be called Jesus Christ, the Son of God, the Father of heaven and earth. Mosiah 3:8
- He shall be called the Son of God ... being the Father and the Son -- The Father, because he was conceived by the power of God; and the Son, because of the flesh; thus becoming the Father and Son And they are one God, yea, the very Eternal Father of heaven and of earth. Mosiah 15:2-4
- Is the Son of God the very Eternal Father? Yea, he is the very Eternal Father. Alma 11:38-39
- Jesus Christ, the Son of God, the Father of heaven and of earth. Helaman 14:12
- He be the Son of God, the Father of heaven and of earth. Helaman 16:18
- Behold, I am Jesus Christ. I am the Father and the Son. Ether 3:14
- He that will not believe me will not believe the Father who sent me. For behold, I am the Father. Ether 4:12