(heterozygous) example: Tongue roll  Able to Roll (R) RR (homozygous) or Rr (heterozygous)  ________________________________ No freckles (f): Straight widow's peak (w): Free hanging ear lobe (A): No cleft chin (c): Hitchhiker's thumb (H): No Dimples (d): Interlocking Fingers (Right thumb on top) (l):

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