October 6 Anth 1113 003
Popular in General Anthropology
Anth 1113 003
verified elite notetaker
Popular in anthropology, evolution, sphr
This 2 page Class Notes was uploaded by Red-Roe on Monday October 19, 2015. The Class Notes belongs to Anth 1113 003 at University of Oklahoma taught by Samuel G. Duwe in Summer 2015. Since its upload, it has received 31 views. For similar materials see General Anthropology in anthropology, evolution, sphr at University of Oklahoma.
Reviews for October 6
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 10/19/15
Renee Roe October 6 Human Variation Oct 6 genetic information about particular biological traits encoded in an organism s DNA observable measurable overt characteristics of an organism Humans are a polvtVDic Species variable in some features of our phenotype 0 many different systems ABO Rh 0 very well studied 0 code for proteins on blood cells 0 may once have had adaptive value in resistance to certain diseases 0 ABO blood types in US population I Ab 4 I O 45 I A 40 I B11 0 global distribution of ABO blood types tells us something about population histories attached detached earlobes tongue rolling widow s peak incurved little finger sunsneeze gene ear wax types correlations between genetics and language reflect common history not causality neutral genetic markers are often correlated with language groups both languages and genetics influenced by history of populations past contact and migration natural traits carry a historical signal because natural selection doesn t affect them much 0 simple Mendelian system 2 alleles o recessive allele is almost always fatal in condition I causes malformed sickle shaped red blood cells 0 one recessive allele have slightly compromised health heterozygous condition also provides some resistance to malaria worldwide distribution of recessive alleles corresponds with distribution of malaria extreme forms homozygotes are at a disadvantage 0 intermediate phenotype heterozygotes has advantage in environments with malaria 0 without malaria in environment there is no longer selective advantage to heterozygous state 0 phenotype is highly plastic 0 if there is a genetic component at all it is complex 0 like all polygenic traits they are strongly influenced by environment development and culture 0 phenotype influenced by o differential gene expression 0 gene interaction 0 environment polygenic genetics not well understood different levels of melanin production high rates of melanin production advantageous in equatorial environments disadvantageous in northern latitude Vit D production 0 much variation worldwide I variation shows continuous traits 0 Europe Asia 0 lndia Central Asia 0 East Asia Melanesia Australia 0 less time depth 0 continuous variation across space in the expression of polygenic trait or in the frequencies of one or more alleles normally linked to environmental factors 0 overall reduction in tooth size since origins of agriculture