Are chin dim­ples hered­i­tary?

Focus-Science and Technology - - Q & A - PETE GARIBALDI , KET­TER­ING

A chin dim­ple, or cleft chin, can be hered­i­tary, and passed down in what is known as a dom­i­nant trait. Our par­ents each give us one ver­sion of the gene in­volved in this trait. The two ver­sions are not equal: ‘dom­i­nant’ means that the in­her­i­tance of just one copy of the cleft ver­sion will give you a chin cleft of some de­scrip­tion. It is less likely, but not im­pos­si­ble, to in­herit no cleft ver­sions of the gene and still have a cleft chin. What you pass on to each of your chil­dren will be an­other shuf­fle of the ver­sions, so that, in turn, they may or may not show the cleft.

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