Name __________________________________________ Date _____________ Period ______ Gene Linkage and Mapping Homework 1. The following chart shows crossover frequencies for some genes on an autosome of organism Z. Construct a chromosome map. Order the genes on the chromosome. Genes Crossover Frequency & 5% P Q & 8% P R & 12% P S & 13% Q R & 17% Q S 2. For a series of experiments, a linkage group composed of genes and was found to show the A, B, C D following gene combinations. (All recombinations are expressed per 100 fertilized eggs). Construct a gene map. Determine the sequence of genes on the chromosome. Genes A B C D 12 15 4 A – 12 3 8 B – 15 3 11 C – 4 8 11 D – 3. In the genes for eye color (pr), wing shape (vg), and body color (eb) are all found on the Drosophila, same chromosome. The following crossover frequencies for these genes were determined by experimentation. Genes Crossover Frequency & 12.5% pr vg & 6.0% pr eb & 18.5% vg eb Construct a gene map. Determine the sequence of genes on the chromosome.
Name __________________________________________ Date _____________ Period ______ Gene Linkage and Mapping Homework 1. The following chart shows crossover frequencies for some genes on an autosome of organism Z. Construct a chromosome map. Order the genes on the chromosome. Genes Crossover Frequency P & Q 5% P & R 8% P & S 12% Q & R 13% Q & S 17% 2. For a series of experiments, a linkage group composed of genes A, B, C and D was found to show the following gene combinations. (All recombinations are expressed per 100 fertilized eggs). Construct a gene map. Determine the sequence of genes on the chromosome. Genes A B C D A – 12 15 4 B 12 – 3 8 C 15 3 – 11 D 4 8 11 – 3. In Drosophila, the genes for eye color (pr), wing shape (vg), and body color (eb) are all found on the same chromosome. The following crossover frequencies for these genes were determined by experimentation. Genes Crossover Frequency pr & vg 12.5% pr & eb 6.0% vg & eb 18.5% Construct a gene map. Determine the sequence of genes on the chromosome.