17.4

Question 1

genetic mapping/crossing over exchanges alleles on homologues

Answer 1

organisms have more genes/traits that assort indepdeently than chromsomes
indepdentent assortment of genes on same chromsome is due to crossng over

Question 2

human genoome maps

Answer 2

methods:
test crosses: linkage analysys”
disruption of genes of unknown function
inducing mutant phenotypes
historical pedigrees based on phenotypes
large number of genetic markers that do phenotype” landmarks
short tandem repreats
single nucletide polymorphisms