Patient's question:
Problem Description: Can a single eyelid husband and a double eyelid wife have double eyelid children?Doctor's answer:
In genetic terms, the genes on the chromosome that determine whether a person has single eyelids or double eyelids can be assumed to use the letters A and a to represent the genetic factors for double eyelids and single eyelids, respectively. Since double eyelids are a dominant trait, when A and a come together, as long as A is present, the appearance will be that of double eyelids, unless there are two a alleles in the genes, which would result in single eyelids. From this, we can conclude that if both parents have double eyelids, their child could still be born with single eyelids.