http://en.wikipedia.org/wiki/Protist
Trichomonas vaginalis, a parasitic protist, is not known to undergo meiosis, but when Malik et al.tested for 29 genes that function in meiosis, they found 27 to be present, including 8 of 9 genes specific to meiosis in model eukaryotes. These findings suggest that T. vaginalis may be capable of meiosis. Since 21 of the 29 meiotic genes were also present in G. lamblia, it appears that most of these meiotic genes were likely present in a common ancestor of T. vaginalis and G. lamblia.
These two species are descendants of protist lineages that are highly divergent among eukaryotes, leading Malik et al.to suggest that these meiotic genes were likely present in a common ancestor of all eukaryotes.
Trichomonas vaginalis, a parasitic protist, is not known to undergo meiosis, but when Malik et al.tested for 29 genes that function in meiosis, they found 27 to be present, including 8 of 9 genes specific to meiosis in model eukaryotes. These findings suggest that T. vaginalis may be capable of meiosis. Since 21 of the 29 meiotic genes were also present in G. lamblia, it appears that most of these meiotic genes were likely present in a common ancestor of T. vaginalis and G. lamblia.
These two species are descendants of protist lineages that are highly divergent among eukaryotes, leading Malik et al.to suggest that these meiotic genes were likely present in a common ancestor of all eukaryotes.
No comments:
Post a Comment