Editing Convergent evolution (section)

=== Primates ===

{{Further|Human skin color#Genetics of skin color variation}}

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|colspan=3 style="padding:0;margin:0"|[[File:Convergent evolution human skin color map.svg|222px]] {{resize|90%|Despite the similar lightening of [[human skin color|skin colour]] after moving [[Out of Africa hypothesis|out of Africa]], different genes were involved in European (left) and East Asian (right) lineages.}}
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Convergent evolution in humans includes blue eye colour and light skin colour.<ref name="Edwards 2010"/> When humans migrated [[Out of Africa hypothesis|out of Africa]], they moved to more northern latitudes with less intense sunlight.<ref name="Edwards 2010"/> It was beneficial to them to have reduced [[human skin color|skin pigmentation]].<ref name="Edwards 2010"/> It appears certain that there was some lightening of skin colour ''before'' European and East Asian lineages diverged, as there are some skin-lightening genetic differences that are common to both groups.<ref name="Edwards 2010"/> However, after the lineages diverged and became genetically isolated, the skin of both groups lightened more, and that additional lightening was due to ''different'' genetic changes.<ref name="Edwards 2010">{{cite journal |last1=Edwards |first1=M. |display-authors=etal |title=Association of the OCA2 Polymorphism His615Arg with Melanin Content in East Asian Populations: Further Evidence of Convergent Evolution of Skin Pigmentation |journal=PLOS Genetics |date=2010 |doi=10.1371/journal.pgen.1000867 |volume=6 |issue=3 |pages=e1000867 |pmid=20221248 |pmc=2832666 |doi-access=free }}</ref>

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! colspan=2|Humans
! colspan=2|Lemurs
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|style="padding:0;margin:0"| {{CSS image crop|Image=A_blue_eye.jpg|bSize=100|cWidth = 50|cHeight = 50|oTop = 25|oLeft =25}}
|style="padding:0;margin:0"| {{CSS image crop|Image=Eye_See_You_(2346693372).jpg|bSize=130|cWidth = 50|cHeight = 50|oTop = 8|oLeft =53}}
|style="padding:0;margin:0"| {{CSS image crop|Image=Eulemur_mongoz_(male_-_face).jpg |bSize=400|cWidth = 50|cHeight = 50|oTop = 130|oLeft =150}}
|style="padding:0;margin:0"| {{CSS image crop|Image=Blue-eyed_black_lemur.jpg|bSize=400|cWidth = 50|cHeight = 50|oTop = 100|oLeft =133}}
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|colspan=4 style="padding:0;margin:0"|{{resize|90%|Despite the similarity of appearance, the genetic basis of blue eyes is different in humans and [[lemur]]s.}}
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[[Lemurs]] and [[humans]] are both primates. Ancestral primates had brown eyes, as most primates do today. The genetic basis of blue eyes in humans has been studied in detail and much is known about it. It is not the case that one [[Locus (genetics)|gene locus]] is responsible, say with brown dominant to blue [[eye colour]]. However, a single locus is responsible for about 80% of the variation. In lemurs, the differences between blue and brown eyes are not completely known, but the same gene locus is not involved.<ref>{{cite journal |last1=Meyer |first1=W. K.| display-authors=etal |title=The convergent evolution of blue iris pigmentation in primates took distinct molecular paths |journal=American Journal of Physical Anthropology |date=2013 |volume=151 |issue=3 |pages=398–407 |doi=10.1002/ajpa.22280 |pmid=23640739 |pmc=3746105}}</ref>{{clear left}}