Anthrobio 161 - discussion notes (starting 9-15)

Anthrobio 161- - Anthrobio 161 History of Evolutionary Thought Theological Phase o P rimarily previous to 18th century o All life created by god

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Anthrobio 161 – 09/15/09 History of Evolutionary Thought - Theological Phase o Primarily previous to 18 th century o All life created by god and cannot change (“fixity of species”) - Scientific phase o Linnaeus: organisms can be further divided into classes and orders; humans are part o Buffon: organisms influenced by external environment o Lamarck: inheritance of acquired characteristics Darwinian Evolution: - Natural variation of individuals in populations o Results in differential adaptation of individuals - Because of a constant struggle for resources, “better adapted” individuals likelier to survive - These individuals will pass on their genes – and genetically based adaptations to future generations Mendelian Genetics: - Usually no simple “gene for x” - Complex traits and behaviors result from effects of many genes height, speech, etc. Mendelian/discrete/discontinuous traits - Finite discrete traits resulting from single gene o Ex. tongue rolling, PTC tasting, etc. Allele – alternate form of a gene – ex. A vs. a Genotype: genetic makeup of an individual - For discrete traits: AA, Aa, or aa - Dominant (A): masks effects of other allele (recessive “a”) Phenotype: observable appearance of individual Laws of Mendelian Genetics: - Genetic information transmitted in discrete units called genes o Principle of segregation: parent will pass only one allele to offspring - Individuals will have 2 alleles for a given trait – one from each parent o Homozygous – 2 of the same allele (AA, aa) o Heterozygous- 2 different alleles (Aa)
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Example: Attached ear lobes – (E,e) - Attached is recessive – heterozygous ee - Homozygous dominant – (EE) - What are the potential phenotypes their offspring could have, and the probability of each? Lecture – 09/22/09
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This note was uploaded on 01/18/2011 for the course ANTHROBIO 161 taught by Professor Frisancho during the Spring '10 term at University of Michigan.

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Anthrobio 161- - Anthrobio 161 History of Evolutionary Thought Theological Phase o P rimarily previous to 18th century o All life created by god

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