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How to check DNA data for certain genes
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===What to look for=== Lactose intolerance is associated with [[LCT]] and [[MCM6]] genes.<ref name="ghr-lactose" /> '''Europeans populations''' *rs4988235 (T) and rs182549 (A) alleles, form a haplotype predicting lactase persistence (thus avoiding lactose intolerance) in 77% of Europeans studied. '''Sub-Saharan African populations''' *rs145946881, known as "G/C-14010", is associated with lactase persistence in *rs41380347 T/G(-13915) is less associated. *rs41525747 C/G(-13907) is also less associated. '''Other ethic backgrounds''' It is typical to have only results from some populations, so while it might be possible to have the gene variants above, it could be that there are others more relevant to you. Genetic analysis is based on findings from current research, which is added to regularly.<ref name="snpedia-lactose" /> Lactose intolerance is considered "normal" in the human population, affecting around 65% of the population worldwide, so "lactase persistence", meaning the ability to properly digest dairy and lactose products after infancy is what is considered a "mutation".<ref name="ghr-lactose">{{Cite web | url=https://medlineplus.gov/genetics/condition/lactose-intolerance/ | title = Lactose intolerance: MedlinePlus Genetics | last = | first = | authorlink = | date = | website = Genetics Home Reference|language=en|archive-url=|archive-date=|url-status=|access-date=2021-04-11}}</ref> If none of the lactase persistence variants listed are present then it means you are highly likely to have lactose intolerance, and can only digest limited amounts of dairy dairy or lactose before experiencing symptoms.<ref name="snpedia-lactose" /> Lactose intolerance is strongly linked to ancestry, for example just 8% of people in the [[United Kingdom|UK) have lactose intolerance, compared to 70-100% of people from East Asia, and many people of West African, Arab, Jewish, and South European (e.g., Greek or Italian) descent.
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