Mendelian Genetics · Botany

Which of the following reasons best explains why Gregor Mendel chose Pisum sativum for his genetic experiments?

  1. It requires a very long time to complete each life cycle.
  2. It shows a continuous, blending range of variation in every trait.
  3. It self-pollinates naturally but allows easy cross-pollination.
  4. It produces only a very small number of viable seeds.
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Correct answer: It self-pollinates naturally but allows easy cross-pollination.

Pisum sativum (garden pea) is ideal because it has distinct, contrasting traits and a short life cycle. Its natural self-pollination ensures true-breeding lines, while easy manual cross-pollination allowed Mendel to perform controlled hybridizations.

Difficulty: Medium Question 1 of 20

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