91 



^903.1 I^' FANCY MICE AND RATS. 



Before atte.npting further to analyse ^"-^^^^'^^^Xly^f^^e 

 wild-coloured F, X albino must be g|^X\v S 9 albino ^^^ 

 paper 88 young so produced are recorded viz 39 albino di wu 



Xred/l8d^rkei^l3 1igb-^^ 



as yet given. All the coloured indmd^^^^^^^^ 

 dark-eyed, as would be expected, in accoiciance vv 

 results we should expect — 



105-5 albinos and 105-5 coloured with dark eyes, 



where experi- \ -^-j^^ ^^ 94 „ „ 



ment gave J 



Tt is therefore clear that if we regard the gametes of ¥, as 



it_ is t^eietoie c eolour-bearhig and albmo, m equal 



consisting of two kinds, ^^ ^^^^ ^ ^f ^^^ Mendelian 



Xiigh in all protebility further experiment will enable us to 



"t t"l"tv:rSSwl«.ge of the specific composition of the 

 sev«i Up sti: In F,, and Sntil theyarebrecUeparately.,^^^^^^^^ 



to ciisunsuibii a„hnpr.t to these provisos, we expect the 



:X^^ :at^ witr;le albmos win presumably give 



-"^X^^^^^ ^. singly, it is Hl^ly Ijat ^ 

 eyed yellows will give only yellows, perhaps creams, and albinos, 



* Unless the phenomenon seen "^^'^l^^^'J^.S^X^^^ ftTrecorded that a pink- 



+ lu Mr. Darbishn-e's thml report (28) ,inst PU''"^"^" /,;. .^ o-vey-and-white, 



eyld j^llow-and-white in F, bred with a bmos ^av^ ^ f^^' - ' ^^ ;/^^^,,,, ,p opf 



1 yellovv-and-white. The occnrrence of albinos t^^ tliK .^ ^^^^^ suggested m 



that the constitution of the P^"^ .•;>,«;,^,;^;"^^\^;a';,elnber^ Fo are not yet given. 



generations.— J'«?i', 1903.] 



