Close, if you take a photo and an auto the f1 will be 100% photo because autoflowering is a recessive trait and photoperiod responsive plants are dominant , if you then take a male and female from your f1 population and. Use them to make an f2 generation you will see 25% autoflowrring plants 25% AA fully photo plants and 50% will be photo but be carriers for autoflowering (Aa). So if you then take autoflowering plants from the f2 and make seed from those plants youll get a 100% autoflowering strain by the f3, however if thats all youve been selecting for the strain will still need to be refined to make it more uniform and add stability by locking down just the 1 or 2 phenos you like. Its a lot of work but fun!