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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
Question
For question two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

  1. Both assertion and reason are true and reason is the correct explanation of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Both assertion and reason are false.

Assertion: Mendel was successful in his hybridisation experiments.

Reason: Garden pea proved to be an ideal experimental material.

✓

Answer

  1. Both assertion and reason are true but reason is not the correct explanation of assertion

Explanation:

Mendel chose garden pea as plant material for his experiments, since it had the following advantages:

  • Well defined characters.
  • Bisexual flowers.
  • Predominantly self-fertilisation.
  • Easy hybridisation.

Garden pea having following characteristics proved a very good experimental material. But it was not the only reason for Mendel's success. Main reason was preparation and selection of pure lines by own work and proper statistical analysis of large number of samples, of one character at a time

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