Adam was formed of clay like the other animals.
None of the animals safisfied him.... ew.
God used part of him to make a woman... so only his 'family genes' existed.
Did these children of Adam & Eve have any siblings?
Who did they marry?
Who did they have children with?
Reproducing with their sisters (wives)?
Reproducing with their mother?
20 And Noah began to be an husbandman, and he planted a vineyard:
21 And he drank of the wine, and was drunken; and he was uncovered within his tent.
22 And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren without.
23 And Shem and Japheth took a garment, and laid it upon both their shoulders, and went backward, and covered the nakedness of their father; and their faces were backward, and they saw not their father's nakedness.
24 And Noah awoke from his wine, and knew what his younger son had done unto him.
25 And he said, Cursed be Canaan; a servant of servants shall he be unto his brethren.
26 And he said, Blessed be the Lord God of Shem; and Canaan shall be his servant.
27 God shall enlarge Japheth, and he shall dwell in the tents of Shem; and Canaan shall be his servant.
29 And Abram and Nahor took them wives: the name of Abram's wife was Sarai; and the name of Nahor's wife, Milcah, the daughter of Haran, the father of Milcah, and the father of Iscah.
30 And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him; for he feared to dwell in Zoar: and he dwelt in a cave, he and his two daughters.
31 And the firstborn said unto the younger, Our father is old, and there is not a man in the earth to come in unto us after the manner of all the earth:
32 Come, let us make our father drink wine, and we will lie with him, that we may preserve seed of our father.
33 And they made their father drink wine that night: and the firstborn went in, and lay with her father; and he perceived not when she lay down, nor when she arose.
34 And it came to pass on the morrow, that the firstborn said unto the younger, Behold, I lay yesternight with my father: let us make him drink wine this night also; and go thou in, and lie with him, that we may preserve seed of our father.
35 And they made their father drink wine that night also: and the younger arose, and lay with him; and he perceived not when she lay down, nor when she arose.
In one of the tales of a wife confused for a sister, Abraham states that his wife Sarah is his half-sister—the daughter of his father, but not his mother.[3] However, in rabbinic literature, Sarah is considered Abraham's niece (the daughter of his brother, Haran).[3]
Marriage of cousins was common in the pre-Sinai period. Abraham's son Isaac married Rebekah, his first cousin once removed, the granddaughter of his father Abraham's brother Nahor with Milcah.[9]
Isaac and Rebekah's firstborn son Esau resorted to marrying his cousin Mahalath, daughter of his father's brother Ishmael because his parents did not approve of him having relationships with Canaanites.[10]
Isaac and Rebekah's second son Jacob married his cousins Leah and Rachel, who were daughters of his mother's brother Laban.[11] Leah and Rachel were sisters; a wife's sister is also forbidden.