Week 7 Notes 2/17
Week 7 Notes 2/17 Bio 111
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This 0 page Class Notes was uploaded by Sierra Taylor on Thursday February 18, 2016. The Class Notes belongs to Bio 111 at California Polytechnic State University San Luis Obispo taught by Eric Noel in Winter 2016. Since its upload, it has received 33 views. For similar materials see General Biology in Biology at California Polytechnic State University San Luis Obispo.
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Date Created: 02/18/16
217 78 Using pedigrees to decipher and predict the inheritance patterns of genes Pedigree a type of family tree Useful in documenting a trait of interest across multiple generations of family members Sex Linked Traits Traits that are controlled by genes on the sex chromosome you re not going to see this trait in every generation can be biased towards a certain gender Autosomal Dominant Traits appear in equal frequencies in males and females and do not skip generations like sex linked traits do A trait s mode of inheritance is not always completely obvious some traits may not show complete dominance and many traits are in uenced by the environment Pedigrees help scientists doctors animal and plant breeders and prospective parents determine the genes that individuals carry and the likelihood that the offspring of two individuals will exhibit a given trait 79 Genotypes Translated into Phenotypes Mendel s experiments single gene two alleles didn t capture the complexity of a world beyond pea plants Incomplete Dominance and Codominance the effects of both alleles in a genotype can show up in a phenotype Incomplete dominance the heterozygote appears to be intermediate between the two homozygotes Codominance the heterozygote displays characteristics of both homozygotes ex black white chickens have offspring eith both colors of feathers 710 Blood Type some genes may have more than two alleles Multiple allelism in which a single gene has more than two alleles each individual still carries only two alleles
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