183 



X CHROMOSOME 



cv ct 



\ 



ysc br pnwrb 



C C 



H CHROMOSOME 



/ I0 \20 30 40^5 



f 



60^7 0^8.0 90 100 107 



al dp 



b Bl/\cn vg c 



It tk 

 Centromere 



px sp 



C C 



n CHROMOSOME 



' 7" 



I0\20 30^4,0 St .50^ 60 70 80 90 100 



ru 



ca 



h D th cu sr e 



Centromere 



FIGURE 21-6. Comparison of crossover or genetic (G) and chromosome (C) maps. 



are modifiable by the metabolic state of tine cell. All types of rearrangement are expected 

 to be affected by the physical and chemical state of the chromosome, the amount and location 

 of its euchromatin and heterochromatin, its position relative to other chromosomes, the 

 number and arrangement of the other chromosomes present, the presence or absence of a 

 nuclear membrane, and the movements of broken ends as influenced by cellular particulates, 

 fluids, and extracellular factors. 



