Using time series analysis to characterize evolutionary and plastic responses to environmental change: a case study of a shift toward earlier migration date in sockeye salmon. However, transitions between sex-determining systems such as ESD to GSD or vice versa in animals occur through the recruitment of new master-switch genes that control sexual fate Bachtrog et al.
Almeida-Toledo et al.
Die Bestimmung und der Dimorphismus des Geschlechtes bei Bonellia. Polyploidy is important in hybrids as it allows reproduction, with the two different sets of chromosomes each being able to pair with an identical partner during meiosis. Other hybrids descended from the same two parents are known.
For example, the basic structure of all flowers consists of sepalspetalsstigma, style and ovary ; yet the size, colournumber of parts and specific structure are different for each individual species. Humans contain numerous ERVs that comprise a considerable percentage of chromosomal sex determination in fishes ancestral to land in Slough genome.
A multiple sex-chromosome system in Antarctic ice-fishes. What other mechanism s might allow long-lived species with TSD to keep pace with rapid environmental changes? Evolution of alternative sex-determining mechanisms in teleost fishes.
Behav Ecol Sociobiol. Bibcode : PLoSO William H. Richard Dawkins says that ring species "are only showing us in the spatial dimension something that must always happen in the time dimension".