No. 533] INHERITANCE IN COLIAS PHILODICE 



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TABLE III 

 . W ( Y )1 X Yellow J [un 



Thus here is a case comparable to that of yellow mice, 

 which, as shown by Cuenot, Castle and others, are always 

 heterozygous, homozygous yellow mice not being pro- 

 duced; so that the proportions obtained by mating yel- 

 low mice together is 66.6 per cent, yellow, 33.3 per cent, 

 non-yellow. 



4. The wild white males which occur rarely are pre- 

 sumably recessive homozygous whites, but none have 

 yet appeared in my crosses of heterozygous yellow males 

 with heterozygous white females (g and h, 1910), and I 

 have not yet had an opportunity to test their possibili- 

 ties in breeding. 



TABLE IV 



