Here are 4 Bible verses about genetic testing from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Psalms 127:3-5 KJV
Lo, children are an heritage of the LORD: and the fruit of the womb is his reward. As arrows are in the hand of a mighty man; so are children of the youth. Happy is the man that hath his quiver full of them: they shall not be ashamed, but they shall speak with the enemies in the gate.
Psalms 3:1 KJV
LORD, how are they increased that trouble me! many are they that rise up against me.
Psalms 50:4 KJV
He shall call to the heavens from above, and to the earth, that he may judge his people.
John 3:16 KJV
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.