8.2 - Module 8 Complex Inheritance George Mellick E-mail...

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Module 8 Complex Inheritance George Mellick E-mail [email protected] Telephone 3735 5019 (Room N44 2.11) References Chapter 22 of Pierce “ Genetics – A conceptual approach”
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Introduction to statistical methods for analysing quantitative traits Definitions Population The entire group of individuals from which you wish to gain information (eg. Let’s measure the height of all the adult males in the population of metropolitan Brisbane) Sample A sub-set of 1000 males from Brisbane whose height is measured in an experiment (hopefully, this is representative)
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Descriptive statistics Definitions Mean (average) For a group of measurements x 1 , x 2 , x 3 …to x N The variability of a group of measurements Variance (s 2 ) and standard deviation = s 2 q wwwwww wwwwww www
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Frequency distributions for height of males Population mean Population variance Population number Sample mean Sample number Sample variance
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Normal distributions are special Sometimes mathematical tricks are performed to “transform” other distributions into “normal” distributions Z-score (indicates distance from the mean)
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Correlation Measures the relationship between two characteristics If the characteristics vary in a non-independent way they
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This note was uploaded on 03/10/2008 for the course GENETICS 2007 taught by Professor Gene during the Three '07 term at Griffith.

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8.2 - Module 8 Complex Inheritance George Mellick E-mail...

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