Question

why did gregor mendel choose to use purebred plants in his experiments?
○ they reproduce sexually.
○ they exhibit only one form of a trait.
○ they have a variety of traits.
○ they reproduce asexually.

Explanation:

Purebred (homozygous) plants have identical alleles for a trait, so they exhibit only one form of a trait. This allowed Mendel to control variables in his genetic experiments. Sexual reproduction is true of pea plants but not the reason for using purebreds. A variety of traits would complicate analysis, and pea plants reproduce sexually, not asexually. So the correct reason is they exhibit only one form of a trait.

Answer:

B. They exhibit only one form of a trait (assuming the options are labeled A - D in order: A. They reproduce sexually, B. They exhibit only one form of a trait, C. They have a variety of traits, D. They reproduce asexually)