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Bateson's explanation is that the female, according to the Mendelian theory of sex, is heterozygous in sex, the male homozygous and recessive, and that lacticolor is linked with the female sex-character, grossulariata being repelled by that character. Thus we have, the lacticolor character being recessive,
He also discusses the case of Abraxas grossulariata and its variety lacticolor, and other cases of sex-linked heredity, apparently with the idea that all such cases are similar to those of sexual dimorphism.
It will be seen that although in the progeny of this mating all the grossulariata were males and all the lacticolor females, yet this case is by no means similar to that of sexual dimorphism in which the characters are normally always confined to the same sex. For the lacticolor character in the parent was in the male, while in the offspring it was in the female. Univ.
Homozygous. B male B male X b female b male B male b female b male b male Barred female. Barred male. Heterozygous. This case is thus exactly similar to that of Abraxas grossulariata and A. lacticolor.
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