Final answer:
Mendel's work was first widely recognized in 1900 when three different European scientists independently arrived at his conclusions and revitalized his work.
Step-by-step explanation:
In 1865, Mendel presented the results of his experiments with nearly 30,000 pea plants to the local natural history society. He demonstrated that traits are transmitted faithfully from parents to offspring independently of other traits. In 1866, he published his work, Experiments in Plant Hybridization, in the Proceedings of the Natural History Society of Brünn. Mendel's work went virtually unnoticed by the scientific community, which believed, incorrectly, in the theory of blending of traits in continuous variation.
Mendel's work was not widely recognized until 1900, when three different European scientists independently arrived at his conclusions and revitalized his work. Prior to this, Mendel's work was largely ignored due to various factors such as his lack of reputation among the scientific community and the publication of his research in an obscure scientific journal.