Recent contributions to the scientific substantiation of the gene theory of sexuality in Galinacea
Journal Title: Animal Biology & Animal Husbandry - International Journal of the Bioflux Society - Year 2011, Vol 3, Issue 1
Abstract
The genetic determinism of sex and the equal male to female ratio in chicken was explained in literature by the existence of the male sex, homogametic ZZ, and of the female sex, heterogametic ZW, as well as by the existence of genes in chromosome Z, however, with no corresponding genes of it in chromosome W. This paper presents experiments of genetic recombination which allows the identification in generation F1 of the dominant sex gene linked to the gene that determines the monitored colour phenotype. In the same generation the recessive sex allele was identified in chromosome Z. In generation F2, males and females are in equal ratio in every category of genotypes.Three categories of feather colour genotypes were produced: dominant homozygous, heterozygous and recessive homozygous. The experimental results show the presence of two genes in chromosome W, the dominant sex gene and the gene transmitting the colour of the feathers, contrary to the hemizygotic theory of Morgan.
Authors and Affiliations
Florin Pricop, Lavinia Pricop
Keywords
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