Re: Article: Parasite genes reveal long sexual history

From: William L Hunt (wlhunt_at_earthlink.net)
Date: 01/30/05 

Date: Sun, 30 Jan 2005 15:30:12 -0500 (EST)

On Sat, 29 Jan 2005 13:59:43 -0500 (EST), "Perplexed in Peoria"
<jimmenegay@sbcglobal.net> wrote:

>
>"Robert Karl Stonjek" <rstonjek@bigpond.net.au> wrote in message news:ctfbc4$2eg5$1@darwin.ediacara.org...
>> Giardia Bares All: Parasite genes reveal long sexual history
>> Christen Brownlee
>>
...
[snip]
...
>PS: My joke above about a metazoan common ancestor for protozoa
>may not be as silly as it first seems. Substitute "colonial"
>for "metazoan" and the idea begins to make sense. And what is
>the word for multinucleate cells - many nuclei sharing a common
>cytoplasm?
 I think both multinucleate or polynucleate are used.

> It would surprise me not at all if we were to find
>THAT morphology somewhere in our family tree.
  In fact Giardia intestinalis itself is binucleate (two nuclei) and
polyploidy. The ploidy of each nucleus cycles between 2 and 4 N.
Whether this has anything to do with it being asexual is still
unknown.
  William L Hunt