Subsequent experiments would demonstrate the veracity of Mendel's findings by replicating his studies and confirming his results. However, it would be nearly a hundred years before the mechanism of this inheritance was discovered. We now know that genes are responsible for the pattern that Mendel observed in his pea plants. Plants and animals usually have two copies of the same gene, one from each parent. It's only when both copies are recessive that the recessive trait—in Mendel's experiments, the trait for white flowers—is expressed, or made visible.
What is the meaning of veracity as used in the passage?