Final answer:
Mendel's studies provided the foundation for modern genetics but did not explain the nature of dominant and recessive factors or how they work.
Step-by-step explanation:
Mendel's studies provided us with the foundation for modern genetics. He discovered the principles of heredity, such as the law of segregation and the law of independent assortment. However, his studies did not explain the exact nature of dominant and recessive factors or how they work.