E 

 F 



H 



RESULTS OF IRREGULARITIES 33 



n=4 



Haploid 



6 SSSS Dif)io'id 2a=8 



Trifjlold 



3n=12 



D SSSS Tetraploid 4n=16 



2(1-1=7 



Trisomic 2n+l»9 



Doubte Trisotnic Z n*2'l0 



Zn*l-1=8 



Figure 7. Diagrams showing some of the different groupings of 

 chromosomes, that may produce living organisms having different 

 hereditary characteristics. In this case the normal grouping is shown 

 at B; four pairs of chromosomes. At A the chromosomes are single 

 instead of in pairs, at C they are in threes, at D in fours. In E to / are 

 various other groupings such as have been observed in some cases. 



