Particulate Inheritance
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Particulate inheritance holds that hereditary factors, later identified as genes, whose alternative versions are alleles, remain discrete and unblended across generations, resurfacing intact even after skipping a generation entirely.
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A recessive white-flower factor, invisible in F1, reappeared in about a quarter of F2 plants.
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A factor's disappearance in F1 is not its destruction — particulate inheritance means it persists, masked, until F2.