UMass Amherst BIOLOGY 280 - Natural Selection: Facilitated by Humans and Observed in Nature (3 pages)

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Natural Selection: Facilitated by Humans and Observed in Nature



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Natural Selection: Facilitated by Humans and Observed in Nature

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Artificial selection supports the theory of Natural Selection. Natural Selection is Observed through Losos's Lizard experiment. Rapid evolution is occurring and it's producing harmful results to Humans.


Lecture number:
5
Pages:
3
Type:
Lecture Note
School:
University of Massachusetts Amherst
Course:
Biology 280 - Evolution:Diversity of Life-Through Time

Unformatted text preview:

BIO 280 1st Edition Lecture 5 Outline of Last Lecture I Adaptive evolution a Darwin s Four Postulates of Evolution b Natural Selection Evidence that the Four Postulates are Accurate c The Grants Medium Ground Finch Experiment Witnessing evolution Outline of Current Lecture II Artificial Selection a Evidence for natural selection b Yoo s Artificial Selection Experiment c Genetic Drift Different from Natural Selection III Natural Selection is observed in the Wild a Losos s Lizards IV Rapid Evolution Can Effect Human Wealth and Welfare a Antibiotic resistance b Pesticide resistance Current Lecture Artificial selection Artificial selection Convinced Darwin that natural selection was the mechanism of adaptive evolution I is the process of selecting who is allowed to breed for a specific benefit our population Evidence for Natural selection Artificially selecting desired traits o Ex small plant tomato ancestor larger plants were selected over time modern day tomato plant Almost all of our crops today resulted from artificial selection o Ex 1 Teosinte plant intermediates Modern corn o Ex 2 Animals dog breeds that s how all these different dog species came about Ancestral wolves only selecting some wolves with different and desired traits and allowing them to breed yielded characteristics desirable to humans o Darwin was interested in domesticated pigeon namely the Rock Pigeon o From the original pigeon we have derived a variety of different pigeon breeds Yoo s artificial selection experiment o Yoo had several populations of fruit flies o Yoo removed a random sample of 250 flies and from that sample he removed 50 from that had the most bristles he is artificially selecting for bristle number These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o He Did this continuously 86 times o Graphing multiple populations shows that bristle number continued to increase after 86



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