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BiologyBiology
4 December, 05:19

After learning in physical anthropology class that a cleft chin is recessive and that dimples, a free-hanging earlobe, and tongue rolling are dominant, your friend tells you over dinner that she is certain she is adopted. What could have caused her to arrive at this conclusion?

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  1. 4 December, 07:07
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    Based on both of her parents have cleft chins and she does not have it.
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