Dorothy: Ma thinks that Angela tried to steal her boyfriend.
Blanche: And you don't?
Dorothy: Of course not.
Blanche: Don't be so sure, Dorothy. Angela and Sophia are sisters. Sisters have a natural adversarial relationship.
Rose: That's 'cause it's genetic. It has to do with the double helix of the DNA molecule.
Dorothy: What?
Rose: It's true. I saw it on television. Peter Marshall played this microbiologist on The Love Boat and he was conducting sinister experiments on the Landers sisters.
Dorothy: My apologies, Rose. For a moment there, I didn't think it had been documented.