What is Heritability of autism?
[[File:FalconHeritability.png|thumb|315x315px|Scientists study the heritability of autism by looking at [[Twin|twins]]. The more similar [[identical twins]] are compared to [[fraternal twins]], the more heritable autism is. The images show various possible values of heritability.]] The '''heritability of autism''' is how much of people getting autism is because of their [[Gene|genes]]. It is also the way that the genes create [[Autism spectrum|autism]]. Autism is mostly genetic, and it has a [[heritability]] of 80% to 90%.<ref>{{Cite journal|last1=Sandin|first1=Sven|last2=Lichtenstein|first2=Paul|last3=Kuja-Halkola|first3=Ralf|last4=Hultman|first4=Christina|last5=Larsson|first5=Henrik|last6=Reichenberg|first6=Abraham|date=2017-09-26|title=The Heritability of Autism Spectrum Disorder|url=https://doi.org/10.1001/jama.2017.12141|journal=JAMA|volume=318|issue=12|pages=1182–1184|doi=10.1001/jama.2017.12141|issn=0098-7484|pmc=5818813|pmid=28973605}}</ref> Heritability is how much genes can explain who gets autism and who doesn't. The environment can still be very important even with a large heritability. Heritability is estimated by studying twins. Since both twins have autism most of the time, it is more genetic. It is caused by many different genes working together, not just one.<ref>{{cite journal |vauthors=Abrahams BS, Geschwind DH |date=May 2008 |title=Advances in autism genetics: on the threshold of a new neurobiology |journal=Nature Reviews. Genetics |volume=9 |issue=5 |pages=341–55 |doi=10.1038/nrg2346 |pmc=2756414 |pmid=18414403}}</ref><ref>{{Cite journal |last1=Weiner |first1=Daniel J. |last2=Wigdor |first2=Emilie M. |last3=Ripke |first3=Stephan |last4=Walters |first4=Raymond K. |last5=Kosmicki |first5=Jack A. |last6=Grove |first6=Jakob |last7=Samocha |first7=Kaitlin E. |last8=Goldstein |first8=Jacqueline I. |last9=Okbay |first9=Aysu |last10=Bybjerg-Grauholm |first10=Jonas |last11=Werge |first11=Thomas |last12=Hougaard |first12=David M. |last13=Taylor |first13=Jacob |last14=Skuse |first14=David |last15=Devlin