Text written in Basque and translated automatically by Elia without any subsequent editing. SEE ORIGINAL
The secret of evolution in papaya chromosomes
2004/03/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria
The papaya plant, Carica papaya, discovers that it can help explain the evolution of sexual chromosomes.
This plant is really unique, as it has flowers of three sexes: females, males and hermaphrodites. The Y chromosome of acidic and hermaphroditic flowers is similar to the X chromosome, but with fewer genes. The genes that determine sex are only 10%.
Researchers believe that the papaya Y chromosome is the precursor of the animal Y chromosome. And it seems that this study is also the starting point to show that sexual chromosomes developed from autosomes, not sexual chromosomes.
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