Why not: твої син і твоя донька
That would be in plural - твої сини і твоя доньки meaning your sons and your daughters
'your' has to prounced everytime in similar circumstances?
You can say Ваші син і дочка
what's the difference between ваш, ваша, and ваші ?
Your/Ваш - male. Your/Ваша - female. Your/Ваші - plural.
And also
Your/Ваше - neuter
Why not твої/твоя