Actually, inheritance of acquired characters is part of Darwin's theory of heredity. Lamarck didn't have an explicit theory of heredity, though his theory of evolution arguably implied something like (but not identical to) inheritance of acquired characters. Darwin said that acquired criminal behavior can be transmitted by heredity. Darwinians were the ones who popularized the notion that pauperism, prostitution, criminality, unemployment, etc, are in our germplasm. They have been saying this for over a hundred years. So "rape genes" are not a new notion--it's always amusing to see an evolutionist pretend to be shocked and offended by this or genetic determinism in general. Isn't that what Richard Dawkins is all about--genetic determinism? Anyway, Julian Huxley, Charles Davenport, Francis Galton, etc all promoted such notions of heredity. Every eugenist believes in this sort of thing and promotes it.
This little 1904 rant by communist-atheist-darwinian Robert Blatchford is interesting:
Are we to believe that the God who created all this boundless universe got so angry with the children of the apes that He condemned them all to Hell for two score centuries, and then could only appease His rage by sending His own Son to be nailed upon a cross ? Do you believe that? Can you believe it? No. As I said before, if the theory of evolution be true, there was nothing to atone for, and nobody to atone. Man has never sifined against God. In fact, the whole of this old Christian doctrine is a mass of error. There was no creation. There was no Fall. There was no Atonement. There was no Adam, and no Eve, and no Eden, and no Devil, and no Hell.For whereas the Christian theory of free will and personal responsibility results in established ignorance and injustice, with no visible remedies beyond personal denunciation, the prison, and a few coals and blankets, the Determinist method would result in the abolition of lords and burglars, of slums and palaces, of caste and snobbery. There would be no ignorance and no poverty left in the world. That is because the Determinist understands human nature, and the Christian does not. It is because the Determinist understands morality, and the Christian does not. For the Determinist looks for the cause of wrong-doing in the environment of the wrong-doer. While the Christian puts all the wrongs which society perpetrates against the individual, and all the wrongs which the individual perpetrates against his fellows down to an imaginary "free will."
A good article. Thanks!