Question

what was the most significant conclusion that gregor mendel drew from his experiments with pea plants? an organism that is homozygous for many recessive traits is at a disadvantage. traits are inherited in discrete units and are not the results of the \blending\ of traits. there is considerable genetic variation in garden peas. recessive genes occur more frequently in the f1 generation than do dominant ones.

Explanation:

Mendel's experiments with pea plants led him to propose the particulate theory of inheritance. He showed that traits are inherited as discrete units (genes) rather than through a blending of parental traits. The idea of blending inheritance was a common belief before Mendel's work. His experiments with monohybrid and dihybrid crosses demonstrated that alleles (different forms of a gene) segregate and assort independently.

• The statement about homozygous recessive organisms being at a disadvantage is not Mendel's main conclusion from his pea - plant experiments. His work was more about the mechanism of inheritance rather than the fitness of organisms with certain genotypes.
• While there is genetic variation in garden peas, this was more of an observation that allowed him to conduct his experiments rather than the most significant conclusion.
• In the F1 generation of his monohybrid crosses (e.g., cross between pure - breeding tall and short pea plants), the dominant trait (tall) was expressed, not the recessive trait. So, the claim that recessive genes occur more frequently in the F1 generation is incorrect.

Answer:

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