Acommon birth defect characterized by an opening between the upper lip and the nose is called:

A common birth defect characterized by an opening between the upper lip and the nose is called Cleft Lip. Cleft lip happens during the early stage of pregnancy. This occurs when there is an unsuccessful connection in the face and lip area while the fetus is developing inside the womb. Both cleft lip and cleft palate are successfully treated with surgery.

If the experiment was perfomed more then once and you get the same results