BIOL 205 Chapter Notes - Chapter 4: Karyotype, Genetic Linkage, Meiosis
15 Feb 2020
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Recombination-based maps: map the loci of genes that have been identified by mutant phenotypes shows single-gene inheritance . What does it mean when 2 genes are linked? the loci of those genes are on the same chromosome. Therefore, the alleles on any one homolog are physically joined (linked) by the dna between them. 4 and 5 = textbook specific i think. 4 genes known to be on different chromosomes (unlinked genes) are shown separated by a semicolon for example, a/a ; c/c. 5 genes of unknown linkage are shown separated by a dot, a/a d/d. 4. 2 mapping by recombinant frequency bigger the distance b/w genes, the more likely that a crossover will take place and the higher the proportion of recombinant products will be! Therefore, the proportion of recombinants is a clue to the distance separating two gene loci on a chromosome map!
