Is Lactase Persistence Dominant or Recessive?

Lactase persistence is an autosomal-dominant trait that is common in European-derived populations.

Why is lactase persistence a dominant trait?

Lactase persistence behaves as a dominant trait because half levels of lactase activity are sufficient to show significant digestion of lactose. ... They are all located in a region of the gene MCM6 upstream of LCT. This region is considered as an enhancer region for the transcription of LCT.

Is lactose intolerance autosomal recessive?

It's caused by an inherited genetic fault that means affected babies produce very little or no lactase. The genetic mutation responsible for congenital lactase deficiency is passed on in an autosomal recessive inheritance pattern. This means both parents must have a copy of the faulty gene to pass on the condition.