During the 1860s, Gregor Mendel Laid the Foundation for People's

Multiple Choice

During the 1860s, Gregor Mendel laid the foundation for people's understanding of patterns of inheritance. Mendel's most important finding was that

A) genes occur singly and not in pairs.
B) genes do not have fixed positions on chromosomes.
C) dominant traits are expressed only if both copies of a gene are recessive.
D) traits are transmitted independently of each other.