Mendel established several principles of heredity from his experiments and observations. What did he conclude regarding the inheritance of genes from parents?

A. Offspring inherit two copies of each gene from the dominant parent.

B. Offspring inherit one copy of each gene, and some genes are inherited from one parent and some from the other parent.

C. Offspring inherit two copies of each gene, one from each parent.

D. Offspring inherit one copy of each different allele that exists for a gen