224 



Coat-Colour in Babbits 



mated several times with the same agouti </* and, as Table I shews, the 

 results are in fair accordance with expectation : 



Fi $ 10 was also crossed with the Himalayan ^ and gave 2 agouti, 

 1 black, and 5 Himaiayaus, expectation here being 2 agouti, 2 black, 

 and 4 Himalayans. 



The F2 generation from the Fj blacks. 



Though the F^ blacks originated from two different sorts of cross, 

 viz. from yellow x Himalayan as well as from tortoise x Himalayan, 

 they should nevertheless all behave similarly. For thers is no reason 

 to suppose that there is any difference between a tortoise gamete 



TABLE IL 



