I am from Russia. I think that qualities of a good son and daughter almost have not changed for the past several centuries. However, I believe that some qualities have changed. I will give the following reasons to support my answer.

Parents always expect from their children love, respect and help. I think these qualities remain unchanged. However, at old times parents expected from their daughter to be a good and practical woman because in this case she can marry a good and perspective man. Nowadays, I think parents' expectations from their daughter have changed. Now a woman has the same rights and opportunities to make a great career, make money and be successful at equal terms with a man. It means that now parents are not so worried about a future perspective husband. They know that their daughter can take care of herself and be happy. Nowadays parents teach their daughter to believe in herself, be motivated and strong. They want to be proud of her.

As for a son, I think expectations remain the same. Parents see their son as a clever, motivated and successful man.

To sum up, parents wish their children be more successful then themselves, achieve more goals. So, they with great patience pass down their knowledge and experience to their children. They teach them only good things and expect respect and love in return. Also, parents try to teach their children how to avoid mistakes they have made in their lives. I think the main quality of a good son or daughter is to make their parents proud.