BIOL1020 Lecture Notes - Lecture 18: Genetic Recombination, Genetic Linkage, Vulgate
Document Summary
If recombination happens, 4 gametes are produced and 2 are identical to parental chromosomes. Recombination between two chromosomal locations will only happen in some meioses, thus gametes with parental chromosomes >= recombinant gametes. Genes named according to mutant phenotype - b for black body, vg for vestigial wings. Original form of gene is called wild type - b+ or vg+ 4 unique gametes from f1 --> 4 unique types of offspring. Expect all 4 types of offspring in 1:1:1:1 ratio. 2 unique gametes from f1 --> 2 types of offspring. Expect only 2 types of offspring in 1:1 ratio. Recombination frequency recombinant offspring total progeny recombinant offspring total progeny. The genetic map distance is 17 centimorgans (cm) Genetic mapping is used to determine the location and relative order of genes on a chromosome. Relies on two important concepts in genetic analysis: genetic linkage and genetic recombination.
