Cleft chin 2352587 225168665 2008-07-12T07:02:20Z ClueBot 4928500 Reverting possible vandalism by [[Special:Contributions/71.240.14.40|71.240.14.40]] to version by Mukadderat. False positive? [[User:ClueBot/FalsePositives|Report it]]. Thanks, [[User:ClueBot]]. (438413) (Bot) [[Image:Mckinley.jpg|thumb|200px|right|[[William McKinley]] ]] [[Image:Human_jawbone_front.jpg|right|thumb|Human jaw front view]] A '''cleft chin''', '''chin cleft''', '''dimple chin''', or '''chin dimple''' is a [[dimple]] on the [[chin]]. It is a [[Y-shape]]d fissure on the chin with the underlying bony peculiarity.<ref>{{OMIM|119000}}</ref> The chin fissure follows the fissure in the lower [[jaw]] bone resulted from the incomplete fusion of the left and right halves of the jaw during the embryonal and fetal development.<ref>[http://www.informatics.jax.org/searches/Phat.cgi?id=MP:0000114 Mammalian Phenotype Browser:Cleft chin]</ref> This is an [[Mendelian inheritance|inherited]] trait in humans, where the [[Dominance relationship|dominant]] gene causes the cleft chin while the recessive geneotype presents without a cleft. However, it is also a classic example for variable [[penetrance]]<ref>{{cite web | last = Starr | first = Barry | title = Ask a Geneticist | work = Understanding Genetics | publisher = TheTech | date = | url = http://www.thetech.org/genetics/ask.php?id=47 | accessdate = 2007-07-01}} </ref> with environmental factors or a [[modifier gene]] possibly affecting the [[phenotype|phenotypical]] expression of the actual [[genotype]]. ==See also== * [[Mendelian inheritance]] * [[List of Mendelian traits in humans]] * [[Cleft chin murder]] ==References== <references/> [[Category:Facial features]] [[Category:Genetics]] {{anatomy-stub}} [[ja:ケツ顎]]