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    Question

    A Double top cross refers

    to:
    A Inbred × inbred Correct Answer Incorrect Answer
    B Inbred × OPV Correct Answer Incorrect Answer
    C Single cross × inbred Correct Answer Incorrect Answer
    D Single cross × OPV Correct Answer Incorrect Answer

    Solution

    A double top cross in plant breeding involves crossing two single crosses (hybrids) with each other. Single crosses are obtained by crossing two inbred lines, while open-pollinated varieties (OPVs) are typically populations of plants that have been allowed to freely cross-pollinate and are genetically diverse.

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