Dimples are inherited in an autosomal dominant manner, and they are normal due to a developmental defect in the muscles of the cheeks. Dimples are dominantly inherited, a dominant trait. The probability of dominant inheritance is higher, and when both parents have dimples, the probability of having a child with dimples is higher. When a pair of alleles controlling a biological trait are both recessive, the trait is recessive, and when at least one of the pair of alleles is dominant, the trait is dominant. If both parents have dimples, there is a high probability that the child will have dimples. If at least one of the parents has dimples, the child has a certain probability of having dimples, and if neither parent has dimples, the child will not have dimples, so dimples are said to be dominantly inherited. If the patient has an abnormality in the cheek muscles, he or she should seek medical attention to prevent the condition from progressing.