This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: w/in human populations o Phenotypes Lactase persistence = lactose tolerant Lactase non-persistence = lactose intolerant o Genotypes Homo or Heterozygous for LAC*P = High digestive capacity (HDC) Homozygous for LAC*N = LDC • What selective pressures shaped lactase persistence? o Availability of other forms of nutrients o Nomadic pastoralists used fresh milk on a regular basis and therefore had to be able to digest it • What does study say about potential speed of evolution? o The speed of evolution can be relatively fast, especially when we’re dealing with a matter of nutrition deciding life or death • Potential links between cultural & biological evolution in humans? o Certain ways of life could contribute to bio evolution depending on the way nourishment needs are met...
View Full Document
- Summer '07
- LACTASE PERSISTENCE, LCT