SpiritualFamily.Net

Such a great question,  as we know! Both Joseph and Mary were his biological parents(not Gabriel).

Looking at Paper 122:1.1 entitled Joseph and Mary, we see each of the attributes which culminated in why this couple (of 3 who were being closely watched) was chosen as the "entry point" onto Urantia for our Creator Michael, to become Yeshua/Joshua ben Joseph.  And did they choose well!

So, I paste here what we now know about Joseph, his earthly father, see what strikes you most! Is there any ONE qua,ity you say stands out for you? 

 "Joseph, the human father of Jesus (Joshua ben Joseph), was a Hebrew of the Hebrews, albeit he carried many non-Jewish racial strains which had been added to his ancestral tree from time to time by the female lines of his progenitors. The ancestry of the father of Jesus went back to the days of Abraham and through this venerable patriarch to the earlier lines of inheritance leading to the Sumerians and Nodites and, through the southern tribes of the ancient blue man, to Andon and Fonta. David and Solomon were not in the direct line of Joseph’s ancestry, neither did Joseph’s lineage go directly back to Adam. Joseph’s immediate ancestors were mechanics—builders, carpenters, masons, and smiths. Joseph himself was a carpenter and later a contractor. His family belonged to a long and illustrious line of the nobility of the common people, accentuated ever and anon by the appearance of unusual individuals who had distinguished themselves in connection with the evolution of religion on Urantia."

Here is the description of his very earthly mother(as opposed to the holy woman many Christian churches promote),  Mary : is there anything here which stands out for you? 

"Mary, the earth mother of Jesus, was a descendant of a long line of unique ancestors embracing many of the most remarkable women in the racial history of Urantia. Although Mary was an average woman of her day and generation, possessing a fairly normal temperament, she reckoned among her ancestors such well-known women as Annon, Tamar, Ruth, Bathsheba, Ansie, Cloa, Eve, Enta, and Ratta. No Jewish woman of that day had a more illustrious lineage of common progenitors or one extending back to more auspicious beginnings. Mary’s ancestry, like Joseph’s, was characterized by the predominance of strong but average individuals, relieved now and then by numerous outstanding personalities in the march of civilization and the progressive evolution of religion. Racially considered, it is hardly proper to regard Mary as a Jewess. In culture and belief she was a Jew, but in hereditary endowment she was more a composite of Syrian, Hittite, Phoenician, Greek, and Egyptian stocks, her racial inheritance being more general than that of Joseph."

Hoping this helps!