To some extent, but not for all that many generations.
"Environmentally induced phenotypes can in this way persist for several generations, due to the transmission of molecular factors that determine how DNA is read and expressed".
Engineering talent isn't a single inheritable trait. It's a lot of different skills, many of which will be heritable, but it's unlikely that you could select a line of good engineers in the same way that you could select a line of fast race-horses, and the particular skills you'd be looking for would probably evolve as engineering developed, so your selected blood would become obseleter ather rapidly
Rubbish.
Really? Bach had a lot of kids and some of them survived and did well in music, but there's no famous modern descendant of Bach.