New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Given below are two statements: Statement I: A

    pureline variety is a variety which obtained from many heterozygaus plants of cross pollinated crop. Statement II: A pureline become genetically variable with time due to mechanical mixture, natural hybridization and mutation. In the light of the above Statements, choose the correct answer from the options given below:
    A Both Statement I and Statement II are true Correct Answer Incorrect Answer
    B Both Statement I and Statement II are false Correct Answer Incorrect Answer
    C Statement I is true but Statement II is false Correct Answer Incorrect Answer
    D Statement I is false but Statement II is true Correct Answer Incorrect Answer

    Solution

    Statement I is false because a pureline variety is not obtained from many heterozygous plants of cross-pollinated crops. A pureline is derived from a single homozygous individual through self-pollination over successive generations to maintain genetic uniformity. Statement II is true. While purelines aim to maintain genetic uniformity through strict self-pollination, over time, genetic variability may still occur due to factors such as mechanical mixture, natural hybridization, and mutation. These processes can introduce genetic variations in a pureline despite efforts to maintain purity through self-pollination.

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