(A) The phenomenon where the progeny of a cross between two genetically different parents exhibits superior traits, such as increased growth, yield, o

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(A) The phenomenon where the progeny of a cross between two genetically different parents exhibits superior traits, such as increased growth, yield, or fertility compared to the parents, is known as $Heterosis$ or $Hybrid \text{ } vigour$. This occurs due to the accumulation of dominant alleles and the masking of deleterious recessive alleles in the hybrid.