GENE 320 Lecture Notes - Lecture 3: Mutual Exclusivity, Chromosome, Random Variable
Document Summary
1st model organisms used for genetic research useful because of their short generation time large number of offpsring well established pure/homozygous breeding lines. Easily identi able characteristics and states easy to analyze phenotypes. By mating two different peas, the ability to identify the dominant and recessive traits were discovered. This was discovered through the mating over two or more generations of peas. After mating these different peas, it"s hard to visibly see which ones are heterozygous or homozygous. So identify which they are, a test cross is done to show how their offspring may turn out. Hereditary factors/genes occur in pairs in each individual. They exist in alternative forms that can substitute for one another. Individuals containing two alternative factors, one factor can hide the other so that one is expressed in the organisms = dominant and recessive factors. Individuals may have the same outward appearance but can be genetically different.
