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2006-08-23 22:11:51 · 3 answers · asked by Jan Viljoen 1 in Science & Mathematics Biology

Has Pikaia gracilens of the Cambrian explosion been described, by whom and its DNA inferred?

2006-08-24 03:47:14 · update #1

Has Pikaia gracilens of the Cambrian explosion been described, by whom and its DNA inferred by palaeogenomics?

2006-08-24 04:07:16 · update #2

3 answers

Pikaia is known from the fossil records of the Burgess shale and was first described by Charles Walcott in 1911 and reexamined by Simon Conway Morris in the late 1970's - which led to its present fame.

There is no way it's DNA can be inferred from palaeogenomics. It is a pure fossil - i.e. it is known from geological specimens and not from any biological material, hence no source of DNA for even very minimal sequencing is or ever will be available.

Furthermore, our understanding of evolution and relationships between extant species and Pikaia is necessarily so minimal that any attempt to infer its DNA sequence would unfortunately be pure guesswork and essentially futile.

2006-08-26 00:33:34 · answer #1 · answered by the last ninja 6 · 1 0

It has been described or it wouldn't have a name.
There is probably no way its DNA can be guessed
at. While the preservation is unusually good for
something that old the nucleic acids are doubtless
either completely broken down or at least so much
altered that they would provide little information.

2006-08-24 10:35:43 · answer #2 · answered by Anonymous · 0 0

not very well

2006-08-24 07:18:59 · answer #3 · answered by hanumistee 7 · 0 0

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