Popular in Perspectives in Biology 1
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This 2 page Class Notes was uploaded by charlotteee on Wednesday September 9, 2015. The Class Notes belongs to 15068 at University of Rochester taught by Clark, Michael in Summer 2015. Since its upload, it has received 13 views. For similar materials see Perspectives in Biology 1 in Biology at University of Rochester.
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Date Created: 09/09/15
Jasmine Han BIO 112 Sept 9th 2015 Review of Mendel P generation Round times Wrinkled Peas F1 generation All Round His controlled so have been crossing Round peas with Round peas and Wrinkled peas with Wrinkled peas F1 generation crossed with F1 generation 31 ratio Mendel s Hypothesis That there were some laws governing inheritance different pieces of information are sometimes manifested in the phenotypes and sometimes not Mendel Conclusions Dominant versus recessive Law of segregation and independent Assortment used guidelines for designing experiments in heredity choice of study organisms used true breeding strainsused homozygous individuals reciprocal crosses follow for multiple generations applied math to biology used large sample sizes and tested a modelhypothesis with controlled test crosses Hugo de Vries Karl Correns Erich von Tschermak discovered and understood Mendel s paper Sir Archibald Edward Garrod applied Mendelism to humans determined that Alkaptonuria was a recessive trait and rst demonstrated that diseases were quotinborn errors of metabolismquot and Mendel s laws apply to humans Reginald Punnett and William Bateson tried to sell Mendelian laws discrete characters we can use Mendel laws Mendelian says that you have distinct and discrete characters Walter Weldon did not agree with Mendel laws supported blending inheritance continuous charactersphenotypic distributions BRCA1 obeys Mendelian inheritance but the phenotype is more complicated because of environmental factors as well as the fact that there are multiple genesgenetic background Penetrance the proportion of individuals with a speci c genotype that express a trait Gene segment of DNA or nucleic acid that codes for a protein Epistasis an allele of one gene effects the allele of another geneexpression of another gene Example Pigmentation in Labradors Norm of Reaction the variation of a phenotype produced by a genotype in different environments Pleiotropy a single gene having an effect on more than one trait Example taming wild foxes that ended up changing other traits such as coat color oppy ears bone structure tail wagging If the dihybrid cross doesn t produce the 9331 ratio that means that either the genes are linked or that the genes are not independent