Hugo De Vries Mutation Theory

All mutations are lethal and are eliminated by nature.

Mutations always occur in a single direction.

Chromosomal mutations are not accompanied by a visible change in the structure of the chromosome.

Mutations are the raw material of evolution and appear gradually.

New species are produced only through the accumulation of multiple mutations.

Polyploidy is more commonly observed in animals than plants.

All mutations are harmful to an organism.

Gene mutations can be caused by ultraviolet rays and chemicals.

Divergent evolution is the process by which a single ancestral species gives rise to a single new form.

Quantum evolution is a slow and gradual process of evolution.