This is the notebook for chapter 4 in Genetics and Analysis of Quantitative Traits. Basic definitions Gene Locus Alleles Sex Chromosomes Autosomes Quantitative-trait Loci (QTLs) Allele and genotype frequencies Suppose (P{11}), (P{12}), and (P_{22}) represent the proportions of the population that are (B_1B_1), (B_1B_2), and (B_2B_2). The frequency of the (B_1) allele is [p1=\frac{2P{11}N+P{12}N}{2N}=P{11}+\frac{1}{2}P_{12}] Hardy-Weinberg Principle Assumptions no mutation random mating no gene flow infinite population size no selection Under the conditions of our …