What is the name of the early to mid-1950's sci-fi short story in which an asteroid miner and his wife decide to have their pretty, intelligent daughter dumbed down and made less attractive?
It's not an exact match - the parents aren't miners, they're farmers, and the setting is a planet at Deneb, not an asteroid - but I'm still going to suggest this is No Charge for Alterations by H.L. Gold.
The time frame matches (first published in 1953, anthologized 1955), as does the plot. (The daughter is not a good fit for a farming planet, so is "altered" to be happier and productive.)
You can read the entire story online at Project Gutenberg.
Also the (unaccepted) answer to this question