Selective breeding develop genetic composition from existing genes for desired traits. On this base; God formed woman from existing genes He created earlier in Adam.
Genesis 2: 20-22; “So the man gave names to all the livestock, the birds of the air and all the beasts of the field.
But for Adam no suitable helper was found. So the Lord God caused the man to fall into a deep sleep; and while he was sleeping, he took one of the man’s ribs and closed up the place with flesh. Then the Lord God made a woman from the rib he had taken out of the man, and he brought her to the man. End of quote.