Question

Is crossing you right thumb over you left dominant or recessive?

Answer 1

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When people clasp their hands, almost all have a strong preference; either theright thumb is on top (R) or the left thumb is on top (L). Hand-clasping is sometimes used to illustrate basic genetics; the myth is that hand-clasping is controlled by one gene with two alleles, and the allele for L isdominant.

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