In 'Knots Landing', from which show did the series spin off?

Which Western series ran for 20 seasons on CBS, from 1955 to 1975? In 'Bonanza', what is the name of the Cartwright family ranch? In 'Dallas', what is the name of the Ewing family ranch? In 'Dynasty', which actress played Alexis Colby? Which prime-time soap opera was a spin-off of 'Beverly Hills, 90210'? Which daytime soap opera debuted on NBC in 1965 and is known for its hourglass opening? Which soap opera is set in the fictional town of Port Charles? Which soap opera is set in the fictional town of Genoa City?