IMED2004 Study Guide - Final Guide: William Bateson, Genetic Linkage, Mendelian Inheritance
Document Summary
Genes located close together on same chromosome are called linked genes and belong to same linkage group. Linked genes travel together in meiosis, arriving at the same destination (ie same gamete) and are not expected to assort independently. All characteristics examined by mendel in peas did assort independently! Homozygous purple flowers, long pollen x homozygous red flowers, round pollen. (purple dominant over red, long over round) An excess of f2 had parental phenotypes, two loci lie close together on same chr. Purple dominant over red, long pollen dominant over round. Did not follow the ratio, most likely linked genes, belong to same linkage group so not expected to be assorting independently. Diploid organism, two alleles at a locus separate in meiosis, one into each gamete. This separation process, two alleles act independently of alleles at other loci. 1st parent (aabb) produces gametes ab, 2nd parent (aabb), produces gametes ab.
