Good point. In the beginning, there was no heirarchical (sp?) relationship. Patriarchy is a result of the fall. It's part of the curse that God is redeeming and will redeem.
This "patriarchy" began immediately with the her bite of the apple. You see the punishment for sin began at the inception. Notice the effects of sin before a knowledge of sin:
"Then the eyes of both of them were opened, and they realized they were naked; so they sewed fig leaves together and made coverings for themselves.
Then the man and his wife heard the sound of the LORD God as he was walking in the garden in the cool of the day, and they hid from the LORD God among the trees of the garden."
Sin is the by product of the condition of thought and behavior contrary to the character of God.
Adam as the primary laborer who tended the garden, and named the animals was responsible for their care. Then God created him a help meet: help, succour (assistance) and she was not less than He in stature. She was however made for him (not implying ownership.)
Therefore when she bit the apple, he, in that brief period before biting himself, as the primary laborer, not the assistant, could have sanctified his unbelieving wife.
"For the man is not of the woman: but the woman of the man. Neither was the man created for the woman; but the woman for the man... Nevertheless neither is the man without the woman, neither the woman without the man, in the Lord.
For as the woman is of the man, even so is the man also by the woman; but all things of God."
"For the
unbelieving husband has been
sanctified through his wife, and the
unbelieving wife has been
sanctified through her believing husband. Otherwise your children would be unclean, but as it is, they are holy."
Hence, the unclean children of Adam.