Question

    Which of the following statements best explains the term

    “heterosis” in the context of hybrid crop breeding?
    A Reduction in performance due to hybridization Correct Answer Incorrect Answer
    B Increased performance of hybrids over their parents Correct Answer Incorrect Answer
    C Segregation of alleles in subsequent generations Correct Answer Incorrect Answer
    D Genetic uniformity in the hybrid population Correct Answer Incorrect Answer
    E Occurrence of lethal genes in homozygous condition Correct Answer Incorrect Answer

    Solution

    Heterosis, or hybrid vigor, refers to the superior performance of F1 hybrids compared to their parents in traits like yield, vigor, and resistance. It results from the masking of deleterious recessive alleles, gene interactions, and increased heterozygosity.

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