2007-06-14 17:56:48 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
The ribosomal RNA gene of sea urchin differs from that of Xenopus laevis in the following respect:
Base composition: Sea urchin has lower buoyant density and thus lower GC content that that of Xenopus.
Length of the repeat unit: Lytechinus rDNA has less number of repeats than that of Xenopus.
Length of the nontranscribed spacer: Lytechinus rDNA has smaller nontranscribed spacer.
Variations in the ITS: Both differ in terms of sequence and length of internal transcribed segment.
2007-06-15 16:35:02 · answer #1 · answered by Ishan26 7 · 0⤊ 0⤋
Xenopus and sea urchins are in completely different phyla. The sea urchin is an Echinoderm and Xenopus is a vertebrate in the Chordate phylum. Being as distantly related as they are the rRNA is very different, as you would expect.
2007-06-15 09:06:04 · answer #2 · answered by lightening rod 5 · 2⤊ 0⤋