BIOL 100 Lecture Notes - Lecture 14: Lactase, Abdominal Pain, Allele Frequency
Document Summary
Developed explanation for how evolution occurs called natural selection. The process whereby organisms better adapted to their environment tend to survive and produce more offspring. Change in allele frequencies in a population over time. Is the ability of a microorganism to withstand the effects of an antibiotic. Elephants in queen elizabeth state park - uganda. Currently: 15% of females and 9% of males. Having 2 recessive genes leads to a tuskless elephant. Inability to digest sugar (lactose) in dairy. Lactase allows for the breakdown for lactose. Historically and still in many, intolerance develops during childhood. Gene is turned off and lactase is no longer produced. A mutation allowed for people to continue to digest lactose into adulthood. Co-evolution: there is a relation between two organisms. The influence of closely associated species on each other in their evolution. Convergent evolution: different populations, same traits or characteristics but are independent of each other.
