Just to chime in here,
I think there is a principle involved here, that the church does not teach much, or is not aware of, has been overlooked, but that I do believe is Biblically sound:
Romans 5: Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:..Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come. But not as the offence, so also [is] the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, [which is] by one man, Jesus Christ, hath abounded unto many. And not as [it was] by one that sinned, [so is] the gift: for the judgment [was] by one to condemnation, but the free gift [is] of many offences unto justification. For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.) Therefore as by the offence of one [judgment came] upon all men to condemnation; even so by the righteousness of one [the free gift came] upon all men unto justification of life. For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
What I think is overlooked here is that sin passed from Adam to all of mankind. We know from Genesis that Eve also sinned, and that Eve sinned first - yet the Bible clearly teaches that it was not through Eve, or through both Adam and Eve, that the sinful spiritual nature passed to all mankind - but rather the Bible teaches that the sinful nature only passed through Adam to his children, and all subsequent generations.
What this implies is that the spiritual nature of a child comes through his father, and not his mother. The flesh, the physical body, the physical DNA, the blood type (O, A, AB, etc.) are all attributes that are decided by a combination of the DNA of the father in the sperm, and the DNA of the mother in the egg. And the father's sperm does have more of a "say" in the child, because it is the father's DNA in the sperm that determines the gender of the child. Hair color, eye color, all looks, and genetic conditions are equally determined 50/50 by the mother/father's DNA - but gender is determined by the fathers contribution alone.
But there is no "sin gene" to be removed. The sinful nature of the soul/spirit is a spiritual thing - the flesh is sinful also - but the spiritual nature of the soul of the child is determined by a spiritual heritage line - which is a different matter from a physical heritage line. "Spiritual DNA" if you will, versus "Physical DNA". And I believe the Bible teaches that this "Spiritual DNA" is a different matter, with different rules, than that of physical genetic heritage.
The rules simply put, is that whatever the "spiritual nature" of the father, will be the "spiritual nature" of the child - and the "spiritual nature" of the mother is neutral in this matter.
The Bible I believe refers to the same principle in Ex 20:
Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
The Hebrew word here for fathers refers to male ancestry. As such the iniquities (generational curses) of the child's father, grandfathers, and great-grandfathers are visited on a child - I believe from both the paternal and maternal lines. But the iniquities of the mother, grandmothers, and great-grandmothers are not visited. The maternal line may have the same iniquities as their fathers did, iniquities are visited on children of both genders - but the curses only pass from the males. In this way, comparable to genetics, women may have the disease, but are not directly carriers- but their paternal ancestors continuing carrying the curses down to the children of a woman along an invisible spiritual line.
If this is true, then I believe this helps make the nature of Jesus make more sense. He had a fully human body, of fully sinful and corrupted flesh - but his "Spiritual nature" of His "spiritual DNA" came from God the Father - who is without sin. Being the only begotten son of God, Jesus' "spiritual nature" is that He is God. For anyone with an acceptance of the Trinity or Godhead, I hope this would make sense - that being the son of God, God who is unique and eternal, that Jesus also is in nature (spiritually) - God, unique and eternal.
So physically, Jesus was fully man - but spiritually, He was in nature God.
I would also like to say that I believe the Holy Spirit, at Jesus' conception, caused for human male DNA to be miraculously created by God, containing His spirit and spiritual nature - which then combined with the human DNA of Mary in her egg. God made all life to reproduce after it's own kind, and I believe God created according to His purposes, from Himself in His infinite powers of creation, perfectly human DNA, that contained in it His Spirit, and was from Him, to combine with Mary's egg. Jesus Christ was the literal son of Mary, and of God, and was both human, and the fullness of the Godhead in bodily form.
Just my thoughts.
God Bless!
-Paradox Brown
(And if you want to see the website ChristianCanadian (Thank you!!!) was referencing to, just google "A Modern Guide to Demons and Fallen Angels" which is an online Bible Study for anyone interested in spiritual warfare/ historical info on those subjects)