Sylvia The DNA from Mary, in that one case, must have been purged clean of any trace of Adamic sin.
YA ...here are my thoughts on that ....
the Body without the spirit is DEAD. (James ..somewhere lol lol)
the body is controlled by our mind/thoughts/motivation. I belive the goal of Adam and Eve was first and foremost to be in control of the their natural MORTAL bodies and its natural desires, as they *walked* (fellowshipped) with God.
The *FALL* affected their MINDS (the spirit in their minds Ephesians 4:23) God gave them over to imperfect/depraved (wrong motives) minds ( Romans ..somewhere lol )
So the Word made flesh ( John somewhere ) had no effect on HIS MIND. He had the same mortal body as Adam but under his control... He overcame temptation, evil, sin and death in a mortal body, and died as a righteous man.
For what the law was powerless to do because it was weakened by the flesh, God did by sending his own Son in the **likeness of sinful flesh ** to be a sin offering. And so he condemned sin in the flesh Romans 8:3
Some groups like SDA even suggest Christ's fleshly body was a state of Falleness / sin infected.
My thoughts are that Christ fleshly body inherited the consequences *likeness of sinful flesh* from Mary, but the main driving force is his mind and motivation from his father. A POWER, we must have, if we *WILL* to rule *self* and be like him, a perfect image of God. Galatians 2:20
As Jesus said somewhere the *flesh is of NO VALUE* it's the spirit that gives life !
So Mary was no biggie, it's the powerful motivation he now has to offer mankind, if we WILL it. 1 John 5:9-13 ..