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  1. The characteristic that shows discontinuous variation in humans is C) Tongue rolling. This trait is typically determined by a single gene with two distinct alleles, making it a classic example of a discontinuous or Mendelian trait. Individuals can either roll their tongues (homozygous dominant) or nRead more

    The characteristic that shows discontinuous variation in humans is C) Tongue rolling. This trait is typically determined by a single gene with two distinct alleles, making it a classic example of a discontinuous or Mendelian trait. Individuals can either roll their tongues (homozygous dominant) or not roll their tongues (homozygous recessive).

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