1. Gene Mapping
-Gene mapping is a way to identify relationships between genes on the same chromosome much like a map shows the relationship between different cities and towns

2. Gene Mapping -It is based on recombinant frequencies
ex. The further away two genes are,
the greater the chance of
recombination (crossing over)
-Using these frequencies, we can get a relative idea of where the genes are on the chromosome (aka loci)

3. Gene Mapping
-Recombinant frequencies are determined by crossing two parents and considering the outcome of two different traits
-the proportion of phenotypes in the offspring are used to determine the degree of linkage or recombinant frequency
-If genes are on two different
chromosomes, there is no
recombination happening
-the genes are not linked at all

4. Gene Mapping
-genes that are very close to each other will usually stay together after meiosis
-recombination will likely occur with genes on the same chromosome but not close to each other

5. Gene Mapping Practice Directions: Create a gene map of the
recombinant frequencies
for the genes in a species below.
There are 3 genes: v, w, and z
Gene Frequency
v & w %
v & z %
w & z %