GEN-3000 Chapter Notes - Chapter 7: Negative Number, Single-Nucleotide Polymorphism, Centromere
Document Summary
Genetics, chapter 7, linkage and chromosome mapping in eukaryotes. Crossing over between homologs is the basis for the construction of chromosome maps: it helps determine the distance between genes on the map, chromosome map a diagram showing the location of genes on chromosomes. Linked genes are on the same chromosome: complete linkage two genes are located so close to each other that no recombination can occur between them. Results in a 1:2:1 linkage ratio in the f2 generation. Chiasma crossed strands of nonsister chromatids seen in diplotene of the first meiotic division. Chromosomal theory of inheritance chromosomes are the carriers of genes and the basis for the mendelian characteristics of segregation and independent assortment. The product law the probability that two independent events will occur simultaneously is equal to the products of their two probabilities. A three-point mapping cross aids in determination of the location of three separate genes.
