BIO 200 Lecture Notes - Lecture 16: Herbicide, Zygosity, Prenatal Development
2 Nov 2017
School
Department
Course
Professor
Document Summary
Artificial selection: genetic change within a population which occur because humans intentionally select for certain characteristics either by choosing which organisms to breed or eliminating undesirable individuals. (i. e. artificial selection of horses. In 1933 chickens were producing 126 eggs a year while now it produces an egg 365 eggs a year| cow milk production has risen) In 1837 the book british quadrupeds listed around 20 breeds. Domestication of silver foxes: back then in soviet union in the 1950"s, anyone who didn"t believe of acquired characteristics were sent to prison or killed. A possible explanation of this would be that their genes exist on the same chromosome. Most of the normal bacteria die: the resistant bacteria multiply and become more common than the non-resistant strain of bacteria, eventually the entire infection evolves into a resistant strain and the antibiotic does not work anymore. Since the 1300"s they kept track of the number of people died.
