386 



Maternal InlierUance and Mendelism 



theory demands, gave both normal and crimson-coloured eggs in an 

 approximate proportion of 1 : 1, as the figures quoted below shew : 



Eggs laid 



There are certain normal breeds in vogue which often throw off 

 such crimson-coloured eggs. By the kind help of Mr K. Saito in 

 Ghifu, we obtained two breeds reared in the district of Ghifuken which 

 sometimes gave mixed batches consisting of normal and crimson eggs. 

 The number of normal and crimson eggs respectively found in the 

 batches given by him to us are enumerated below: 



Number of nonnal and 



crimson eggs found in 



eacli batcli laid by a parent 



Names of breeds 

 Univoltine " Ghinpaku ' 



Number 

 of Batclies 



13 



Normals 



248 

 413 

 247 



1G7 



Crimson 



84 



120 



89 



73 



Totals 



332 

 533 

 33G 

 240 



Totals 

 Grand totals 

 Expectation 



1077 

 2152 

 2156i 



357 

 723 



7185 



1434 



2875 

 2875 



These figures suggest to us at once that the crimson-coloured 

 characteristic is a Mendelian one, recessive to the normal-coloured as is 

 tlie former crimson breed. We reared these eggs separately in the 

 spring of 1910. Crimson-coloured eggs from two batches of the second 

 breed gave, without any exception, crimson-eyed worms and moths, 

 while normal-coloured gave all normal-eyed worms and moths. Both 



