Question

what was the most significant conclusion that gregor mendel drew from his experiments with pea plants?
there is considerable genetic variation in garden peas.
traits are inherited in discrete units and are not the results of the \blending\ of traits.
recessive genes occur more frequently in the f1generation than do dominant ones.
an organism that is homozygous for many recessive traits is at a disadvantage.

Explanation:

Mendel's experiments showed that traits are inherited as discrete units (genes), not through blending. This was a key departure from the blending inheritance theory. The other options are incorrect: genetic variation in peas was not his most significant conclusion; recessive genes do not occur more frequently in F1 (F1 shows dominant traits); and the idea about homozygous recessive organisms being at a disadvantage was not his main finding.

Answer:

Traits are inherited in discrete units and are not the results of the "blending" of traits.