Sci-fi about scientists discovering and raising 6-7 embryos from a lost spaceship. Read in 1980s. Spoiler.

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My dad read this book back in 1980s about a group of scientists who found a lost ship with 6(maybe 7) embryos in it. After taking them and raising, these embryos became greatest professionals in their own profession. After that they decided to take over the world but scientists didn't like it and they killed all 6 of them. This is all he could remember