Darwins work predicted genes and genetics. Genetics is confirmation of the theory of evolution.
No it didn't.
"...I for one frankly admit that I was in this respect under the influence of Darwin for a long time, and that only by approaching the subject from an entirely different direction was I led to doubt the transmission of acquired characters." - Weismann, The Supposed Transmission of Mutilations"The occurrence of progressive adaptation by transmission of the effects of use had seemed so natural to Darwin and his contemporaries that no proof of the physiological reality of the phenomenon was thought necessary. Weismann's challenge revealed the utter inadequacy of the evidence on which these beliefs were based" - W. Bateman, Mendel's Principles of Heredity, pg.5.
"With respect to Jews, I have been assured by three medical men of the Jewish faith that circumcision, which has been practised for so many ages, has produced no inherited effect. Blumenbach, however, asserts that Jews are often born in Germany in a condition rendering circumcision difficult, so that a name is given them signifying "born circumcised,"... Dr. Riedel... in North Celebes writes to me that the boys there go naked until from six to ten years old; and he has observed that many of them, though not all, have their prepuces much reduced in length, and this he attributes to the inherited effects of the operation... Notwithstanding the above several negative cases, we now possess conclusive evidence that the effects of operations are sometimes inherited." - Darwin, Variation, volume 1, page 467