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17 July, 18:27

A family has two male children one brother has a straight thumb a straight thumb while the other brother has a bent thumb what causes this difference

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  1. 17 July, 20:35
    0
    This thing does back to their pedigree which mostly comes from their parents so one of the parents has a bent thumb and the other has a straight thumb
  2. 17 July, 21:08
    0
    The brothers have different alleles
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