Editing Human behaviour genetics (section)

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{{Short description|Field that examines the role of genetic and environmental influences on human behaviour}}
'''Human behaviour genetics''' is an interdisciplinary subfield of [[behaviour genetics]] that studies the role of [[Genetics|genetic]] and environmental influences on [[human]] [[behaviour]]. Classically, human behavioural geneticists have studied the [[Biological inheritance|inheritance]] of behavioural traits. The field was originally focused on determining the importance of genetic influences on human behaviour (for e.g., do genes regulate human behavioural attributes). It has evolved to address more complex questions such as: how important are genetic and/or environmental influences on various human behavioural traits; to what extent do the same genetic and/or environmental influences impact the overlap between human behavioural traits; how do genetic and/or environmental influences on behaviour change across development; and what environmental factors moderate the importance of genetic effects on human behaviour ([[gene-environment interaction]]).<ref>{{Cite journal |title=Behavior Genetics: What's New? What's Next |last1=Dick |first1=Danielle |date=2002 |journal=[[Current Directions in Psychological Science]] |last2=Rose |first2=Richard |volume=11 |issue=2|pages=70–74|doi=10.1111/1467-8721.00171 |s2cid=17102119 }}</ref> The field is interdisciplinary, and draws from [[genetics]], [[psychology]], and statistics. Most recently, the field has moved into the area of [[statistical genetics]], with many behavioural geneticists also involved in efforts to identify the specific genes involved in human behaviour, and to understand how the effects associated with these genes changes across time, and in conjunction with the environment.<ref>{{Cite journal |title=The next challenge for psychiatric genetics: characterizing the risk associated with identified genes |last1=Dick |first1=Danielle |date=2006|journal=[[Annals of Clinical Psychiatry]] |volume=18 |issue=4 |pages=223–231 |doi=10.1080/10401230600948407 |pmid=17162621 |pmc=1764634 |last2=Rose |first2=Richard |last3=Kaprio |first3=Jaakko}}</ref>

Traditionally, the human behavioural genetics were a psychology and phenotype based studies including intelligence, personality and grasping ability. During the years, the study developed beyond the classical traits of human behaviour and included more genetically associated traits like genetic disorders (such as [[fragile X syndrome]], [[Alzheimer's disease]] and obesity). The traditional methods of behavioural-genetic analysis provide a quantitative evaluation of genetic and non-genetic influences on human behaviour. The family, twin and adoption studies marks the huge contribution for laying down the foundation for current molecular genetic studies to study human behaviour.<ref name=":0">{{Cite journal |last=Baker |first=Laura A. |date=2007 |title=The Biology of Relationships: What Behavioral Genetics Tells Us About Interactions Among Family Members |journal=[[DePaul Law Review]] |volume=56 |issue=3 |pages=837–846 |pmc=4685725 |pmid=26702156}}</ref>

[[Image:Francis Galton.jpg|thumb|right|140px|Francis Galton]]