ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
Linkage
Two or more loci (genes) tend to be inherited together
Linked Genes
-Loci on same chromosomes
-DONT assort independently
-Can be separated by crossing over & recombination
Crossing Over
Exchange of genetic material between 2 homo chromosomes by breakage and reunion.
Recombination
Unique genetic material
Non sister chromatids
***20% of the time
Map Units
1mu= 1%
Complete Linkage
Male fruit flies (2 possible outcomes)
VERY CLOSE TOGETHER
AaBb 1 or AaBb0
Aabb 0 Aabb1
, aaBb 0 aaBb1
aabb 1 aabb0
Configuration
AaBb 1 or AaBb0
Aabb 0 Aabb1
aaBb 0 aaBb1
aabb 1 aabb0
(COUPLED) (REPULSED)
Mendelian
AaBb1
Aabb1
aaBb1
aabb1
Coupled
AB ab
Repulsed
Ab aB (** 2 loci linked configuration in F1 is repulsed)
Incomplete Linkage
How far apart they are
AaBb 40%
Aabb 10%
aaBb 10%
aabb 40%