I have heard this passage ridiculed one too many times. Are there any scientific explanations behind Jacob's methods to 'legally defraud' Laban of the next generation of livestock? My challenge for those who would ridicule this narrative is to look beyond your prejudice, if any, and find the validity in Jacob's methods.
We'll pick up after Laban cheats Jacob out of the daughter that Jacob desired to marry after keeping Laban's flocks for seven years to earn her. Jacob serves another seven years to get the right wife. Jacob is now ready to return home but Laban entices Jacob to stay since God has blessed Laban's flocks under Jacob's care.
"What shall I give you?" he [Laban] asked. "Don't give me anything," Jacob replied. "But if you will do this one thing for me, I will go on tending your flocks and watching over them: Let me go through all your flocks today and remove from them every speckled or spotted sheep, every dark-colored lamb and every spotted or speckled goat. They will be my wages. And my honesty will testify for me in the future, whenever you check on the wages you have paid me. Any goat in my possession that is not speckled or spotted, or any lamb that is not dark-colored, will be considered stolen." "Agreed," said Laban. "Let it be as you have said." That same day he removed all the male goats that were streaked or spotted, and all the speckled or spotted female goats (all that had white on them) and all the dark-colored lambs, and he placed them in the care of his sons. Then he put a three-day journey between himself and Jacob, while Jacob continued to tend the rest of Laban's flocks. Jacob, however, took fresh-cut branches from poplar, almond and plane trees and made white stripes on them by peeling the bark and exposing the white inner wood of the branches. Then he placed the peeled branches in all the watering troughs, so that they would be directly in front of the flocks when they came to drink. When the flocks were in heat and came to drink, they mated in front of the branches. And they bore young that were streaked or speckled or spotted. Jacob set apart the young of the flock by themselves, but made the rest face the streaked and dark-colored animals that belonged to Laban. Thus he made separate flocks for himself and did not put them with Laban's animals. Whenever the stronger females were in heat, Jacob would place the branches in the troughs in front of the animals so they would mate near the branches, but if the animals were weak, he would not place them there. So the weak animals went to Laban and the strong ones to Jacob. In this way the man grew exceedingly prosperous and came to own large flocks, and maidservants and menservants, and camels and donkeys.