There is a problem that has been bothering me for a long time. My father has double eyelids, my mother has single eyelids, my left eye has double eyelids, and my right eye has single eyelids.

In biology, we know that even if both parents have double eyelids, it is possible to give birth to children with single eyelids.

If one of your parents has a single eyelid and the other has a double eyelid, you may have a single eyelid or a double eyelid.

If both parents have single eyelids, they can only have children with single eyelids.

Your left eye double eyelid and right eye single eyelid are normal, not the genetic variation mentioned upstairs, so don't worry.

There are also many people around me who usually have single eyelids and occasionally have double eyelids if they don't sleep well.

My mother has double eyelids, my grandfather has single eyelids and my grandmother has double eyelids.

My father has double eyelids, and my brother and I both have double eyelids.

Therefore, unless your parents are both single eyelids, the child can only be outside the single eyelid. Everything else is hard to say.