THE FEYSICAL BASIS OF ilZXDELISM 



4-5 



ar. 1 :''. ^ other from the male vriLh the chromosomes in full black, unite 

 1 . : -'-/. the female z"."2ote shovm in the middle of the n.2u:re. The 

 c ' "^ of maternal and paternal chromosomes Trhich result in 

 Li-c 'j.j- :ion of ^erm ceils in such an indi-^iduai are sho^m diasram- 



)•!( )•'( X H 



^^ R 



%.tf 



• r 







•( )•«( >< }< 



zies in Drosopkilji nrr. ;-:'.■: oh:lz. 



:erce5 c: LLcepcHGent s-csregaLior: ci 

 Frj-m Bz'c-::k zr,d Clcusi-n. 



r: y in the lower portion of the dr-re. There are eight diferent 



■^."ays in vrhich the chromosomes may be grouped in the reduction 

 r.rt-T? and on the oasis of chance any one of these t\-pes is as likely 

 ■- : ::ur as any other. As a res^ult there are sixteen possible combi- 

 t-^tions of chromosomes in the germ cells with respect to the original 



