Biology 2581B Lecture Notes - Lecture 3: Telomere, Lynn Margulis, Chloroplast
12 Jan 2016
School
Department
Course
Professor
Document Summary
Pretend we have 2 distinct organisms: both free-living unicellular, and have genomes. A swallows b but does not digest b, so b is still living inside a. B starts providing a benefit to a or vice versa. Lots of time going by 100-1000s of years. Now b is endosymbioant and a is a host. B basically living inside of a but can technically still live outside a. Random mutation in b which knocks out a gene that allows b to. An evolutionary ratchet be free living endosymbiotic gene loss: a genetic change that increases the complexity of a. B and a are happy living together but more mutations are biological system that is hard to undo happening giving gene loss to a and b: b: has decreasing responsibilities, a: too much redundancy. Gene transfer from endosymbioant to host endosymbiotic gene.
