Biol Conserv. Genetic hitchhiking and the evolution of reduced genetic activity of the Y sex chromosome. Cytogenet Genome Res. Differentiation between the sexes exists, therefore, as the primary difference represented by the distinction between eggs and sperm, by differences represented by sex determination differentiation and development in Port Macquarie of the reproductive glands and their associated structures, and lastly by differences, if any, between individuals possessing the male and female reproductive….
Z-linkage of these genes and the evidence for faster rates of evolution on avian Z chromosomes suggest that runaway selection of male ornamentation is a direct result of linkage to a sex chromosome [ Saetre et al.
In males, several testis -determining genes on the Y chromosome direct the sexually undifferentiated indeterminate embryonic gonads to develop as testes. Recombination and nucleotide diversity in the sex chromosomal pseudoautosomal region of the emu, Dromaius novaehollandiae.
Chicken W: a genetically uniform chromosome in a highly variable genome.
Sex Dev. Theoretical linkages between shifts in SDM and traits such as sexually dimorphic gene expression, male and female ornamentation, and speciation should be investigated in greater detail [ Kirkpatrick and Hall, ]. Trend Ecol Evol. Therefore, extant tuataras have an unreasonably and probably inappropriately large influence on phylogenetic reconstructions of SDM in amniotes.
Reduced variation on the chicken Z chromosome. Predicting the fate of a living fossil: how will global warming affect sex determination and hatching phenology in tuatara? In this review, we have characterized relationships between the environment and large-scale genome evolution. Theoretical linkages between shifts in SDM and traits such as sexually dimorphic gene expression, male and female ornamentation, and speciation should be investigated in greater detail [ Kirkpatrick and Hall, ].
Zool J Linnean Soc.