BIOL 1107 1nd Edition Lecture 15 Outline of Last Lecture Study Guide Outline of Current Lecture I Mendelian Genetics a Phenotype b Generations c Genes Current Lecture I Mendelian Genetics Mendel crossed garden peas as his model organisms Focused on inheritance traits Worked with pure lines produced identical offspring when selfpollinated Used these plants to create hybrids Worked with discrete genetics you were either one way or the other Established that it doesn t matter whether the genetic determinates were in male of female for his crosses a Phenotype An individual s observable features expression b Generations Parental generations the adults that were crossed F1 generation the offspring of the parental generation c Genes Hereditary determinants for a trait are now called genes Each individual has two versions of each gene These different versions are responsible for variations in the traits studied The alleles found in an individual are called its genotype which affects the phenotype Individuals have two alleles for each gene Two copies of the same allele are homozygous Two different alleles are heterozygous Independent Assortment alleles of different genes are transmitted independently of one another These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Dihybrid Cross mating between parents that are both heterozygous for two traits The Chromosome Theory of Inheritance chromosomes are composed of genes from maternal and paternal sets
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