From a discussion elsewhere I had about the nature of Sin...
I don't agree. Jesus' flesh and human spirit had no sin at all. Jesus was likely given Mary's DNA but without Joseph's DNA because Joseph would then have taken credit for a "Work" in producing Christ. Flawed Works had to be atoned for and could not produce Eternal Life. Jesus was Eternal Life and was the product of God's Work alone.
DNA can apparently produce defective combinations, but in Mary's case it appears that God "healed" any possible defects in the order of these chemical combinations and the state they were in. The flesh within her imperfect flesh was rendered perfect as far as Christ's being was concerned.
Because human Works are carried on through reproduction, all of mankind, except for Christ, have inherited a Sin Nature and cannot, apart from Christ's Grace, obtain Eternal Life. All of us inherit human DNA as well as a sin-infected human spirituality that disqualifies us from obtaining Eternal Life apart from Christ's Grace.
We all sin, even though through Christ our New Christian Nature may prevail over our Sin impulses--not perfectly but sufficient to show the Nature that we have chosen to reign in our lives. Inheriting human DNA means we inherit flawed Human Flesh. But the Sin is not in the fleshly flaws, eg diseases but rather in the spiritual corruption.
The flesh and the spirit are two separate things. Before we do any Sin we have already been born with a contaminated spiritual nature and will Sin as soon as we are able.
Again, the trial we undergo in life is in proving what Nature we wish to prevail--our New Nature from Christ, which desires to submit to Christ's Righteousness, or our carnal Nature, which wishes to make choices independent of God, even if at times those choices agree with God's choices.
The real battle is in choosing to partner with God *always,* because this proves what Nature we choose to have and to dominate in Eternity. It is not our Sin Nature that condemns us in Eternity. Rather, it is in our choice for Christ, producing a New Nature, or not.
The Bible reveals that they sin nature is transferred biologically to the flesh in reproduction by the male's sperm.
That is why it says sin entered the world through one man (Romans 5:12), even though the woman was the first sinner.
The woman's ovum does not transfer the sin nature.
That is why we see the odd wording found in Genesis 3:15.
And I will put enmity
Between you and the woman,
And between your seed and her Seed;
He shall bruise your head,
And you shall bruise His heel.”
There was no mention of the man's seed in Genesis 3:15.
The woman's ovum itself does not introduce the defective genes to produce a sin nature.
If Adam never fell?
His seed and Eve's ovum would not have had the sin nature enter the world!
For their child would have been born without a sin nature, like Jesus was.
That is why God used Mary's ovum to produce the body of Jesus.
The Holy Spirit provided the perfect genetic materials needed to fertilize the ovum of Mary!
I believe mankind is called Satan's seed because Satan introduced the fall of Adam which resulted with man having a fallen nature.
Like, George Washington is referred to as the father of the USA.