BIOL 120 Lecture : Mendelian Genetics

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silverbat454

17 Feb 2012

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Document Summary

Three main kinds: transmission genetics: inheritance of traits, molecular genetics : gene to phenotype, population genetics: allele frequency related to natural selection, drift, mutation, flow between. Aristotle: inherit potential to form the same features as our parents. Early 19th century: characteristics of parents are blended in the children. If children were blended , populations could be expected to become more and more similar over the generations. Difficult to reconcile this theory with sudden appearances of new traits e. g. albino children in africa. Studied inheritance of peas at his abbey where he farmed. Was not allowed to study mice by his abbot (they were vermin) Used several pairs of true-breeding (homozygous) pea strains (created by previous generations of farmers) Chose to study 7 traits that were easy to score: flower colour, seed shape, pod colour, plant height, etc. Traits chosen were controlled by a single gene with 2 distinct alleles (e. g. flowers were either white or purple)

Related Questions

When Gregor Mendel was developing his ideas of inheritance of characteristics, molecular genetics was not yet discovered. Explain in your own terms, why his two most important ant laws have stood the test of time. What assumptions about them were correct? Describe a scenario in which patterns of inheritance did NOT adhere to Mendelian genetics.

1) Mendelâs examples of inheritance involved transmission of discrete characters such as wrinkled or smooth seed shape, but most phenotypic traits vary continuously, as we easily see with height. How did early population geneticists reconcile these observations?

2) List five evolutionary processes that can generate linkage disequilibrium and one process that breaks it down. Explain your answer.

violetcoyote340

Match the following definitions with the correct term. (We have not yet cover all of them in class, but you can find them in your reading.)