Analysis of Hbtesogeneity in Complex Chaeactess 253 



taken not to allow anything to happen, such as sudden changes of the conditions 

 or violent stimuli which might upset the constitution of some gametes and thus 

 introduce another factor and complicate the results. 



Another example will sufBce to show the manner of reaction of these biotypes 

 to these breediag-tests in the testing of biotype 9, as shown in figure 41. Two 

 males and two females, each from classes a and b of this biotype, that had been 

 derived from extracted stocks from the Texcoco colony and had been pedigreed 

 for four generations, were mated and allowed to breed freely and gave in Fj a 

 progeny of 87 males and 101 females, distributed over the four classes common 



GENERATION 

 P \Matea,: b e 



1 Z^Zf Z>i$ 



[Progen.y.'a b c d ' 



fj< '^ r<fsf zz'f34f etosof 3^-^f 



Udated.: i^Zf ztzf z ^zf z*Zfj 



T 



[Progeny- 'a b c, ? e^ 



Fj,t. rJrZf t7il6$ 770S9f ze^Stf 7«7f 



yilaisd,: jsizf ziZf ziZf z^Zf Z^zt 



{Proaeny: ''3 S e ? e 



F.i iiiiZf lei-tSf 33'*rf 



uaixteA: zt Zf z' Zf ziZf ^ 



' i . ; ^^ 



vProgeny-. abode c d e 



r^\ "^ e'Sf lOilZf IBiztjt Z^f ^'Sf 7iBf 3'*f 



\Mated,: ztzf z^Zf z'zf z'Zf z>Zf z'zf z^^s, 



{Proaeny.^ b c d e" ^ o c d e 



FA S^llf T^'^IOf A/^-fOf 3zi33f zir^ Z^Sf 7^Sfi /Z^T^f Z^ 



\f£xied.: Mzr z'zf Z^Zf ztZf z'Zf, . Nbt continued / 



\Prooerty.'~a Z ^c ^ ^ 



Fg\ *i7f ZI0^IS9f 7eHsf 



yt&^d: Z*Zf Z^Zf ziZf , 



iPTvoeny: abed 

 Fy\ zi'zzf seiiosf *tt'Hf 



\Matea: ^ zl zt z^Zf z'zg, 



f C Biatvptiz 



PvoenY:'~a 3 c^ 5^ ^ '~B 2 c 



•^ i*it7f Mziissf la'isf *>zf rz^iof I3'nf 



vted.: zi Zf zi Zf ZJZf, z'zf ztzf zizf. 



X 



" '^' 4-t7f l7t^I9Zf IS^Jf *'Sf Zaf44f 3a^Z7f 



Not continued Z'Zf Z^ZS Z^Zf. 



■"' [ Not continued 



Fio 41.— Breeding record through a series of generations of a race of primary 

 Wotype 9 in h. mulUUeniata, again showing the constancy of the race within this 

 line. 



to this biotype, as shown in figure 41. From these there were taken 2 males 

 and 2 females from each class, except class a, and mated. This group gave a 

 progeny of 136 males and 124 females in F^. This population showed a group 

 of 7 males and 7 females, which were quite beyond the normal range of this bio- 

 type; they were not removed, but were bred back into the population in the 

 mating for F3. From this population the usual random matings were made 

 and they gave in F3 101 males and 102 females. In this population 3 males and 

 4 females stood quite without the range of the normal biotype and were separated 



