BIOLOGY 2C03 Lecture Notes - Lecture 6: Semicolon, Genetic Linkage, Mendelian Inheritance
Document Summary
Observed exceptions to mendel"s principle of independent assortment. Linkage between genes; genes that are on the same chromosome linkage maps morgans student, alfred cturtevant. & shaw, k (2008) discovery and types of genetic linkage. Soon after the recovery of mendel"s work, several scientists noted traits in their crosses seemed coupled . No: two genes both on the x chromosome = linked, w = white eye gene, m = miniature wings. Half white eyes, miniature wings = parental phenotype. Half red eyes, long wings = a parental phenotype: the following results were obtains: 36. 9% of f2 were recombinant = new combinations of phenotypes. Linked genes do not sort independently: another pair of linked genes on an autosome pr = eye color gene vg = small wings. F2 option 1 different chromosomes, independent sorting. 1 recombination of unlinked genes due to independent assortment; recombination frequency = 50% F2 option 2 on same chromosome, linked.
