BIOL 1000 Chapter Notes - Chapter 7: Pea, Heredity, Phenylalanine
27 Nov 2014
School
Department
Course
Professor
Document Summary
Gene inheritance: each human offspring inherits one maternal and paternal set of 23 chromosomes. Heredity: the passing of characteristics from parents to offspring through their genes; some traits are controlled by a single gene (single trait genes); observing heredity is easy, understanding was difficult; breeding. Homozygous: individual inherits the same two alleles for this gene. Heterozygous: individual inherits different allele from each parent. Mendel"s law of segregation: two copies of each individual"s gene is contributed from the two sets of alleles from the mother and father. Phenotype: visible or physical features / genotype: genetic composition of the organism. Unable to deduce an individual"s genotype from observing the phenotypes. Aa x aa = 0. 5 x 1. 0 = 0. 5 of the recessive gene to be passed (albinism); tt x tt = 0. 5 x 0. 5 = Square: male circle: female shaded: trait of interest. Incomplete & codominance not all traits are completely dominant or completely recessive.
