Re: vertebrate speciation in the laboratory

In message <bc5a5e7c-9786-4ed9-ae07-0ef8cf7f8077@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, jillery <69jpil69@xxxxxxxxx> writes
On May 10, 3:34 am, Ernest Major <{$t...@xxxxxxxxxxxxxxxxx> wrote:
In message
<ad1113ef-438f-4006-a38f-cf268a0f1...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
jillery <69jpi...@xxxxxxxxx> writes



>On May 9, 5:25 pm, r norman <r_s_nor...@xxxxxxxxxxx> wrote:
>> On Mon, 9 May 2011 13:57:09 -0700 (PDT), jillery <69jpi...@xxxxxxxxx>
>> wrote:

>> >On May 8, 9:34 pm, Walter Bushell <pr...@xxxxxxxxx> wrote:
>> >> In article
>> >> <91cc18cc-b7fd-4119-8ab7-815d3a710...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,

>> >>  jillery <69jpi...@xxxxxxxxx> wrote:
>> >> > Except human clones are genetically female.  Wait, maybe Dan >> >> >
>> >> > almost right and Jesus herself was the Holy Grail.

>> >> Identical twins are clones and about half of them are male.

>> >Ok, you got me.  Still, clones of the "identical-twin" kind are not
>> >the same thing as clones of the parthenogenetic kind.  Isn't there
>> >some accepted terminology for distinguishing between the two?

>> My impression is that for many kinds of parthenogenesis where the
>> offspring are clones of the parent there really is no other
>> teminology.  The offspring of any asexually reproducing line, where
>> the reproduction is purely by mitosis, are clones.  It is just that
>> you generally start with a female parent for parthenogenesis so the
>> offspring tend to be female, also.  

>"Generally"?   Do you know any species where the males reproduce
>parthenogenetically :)

If birds were to produce haploid offspring parthenogenetically the
offspring would be male. This has been observed in turkeys.


Right. And when a rooster lays an egg on a pitched roof, which way
does it roll?
Gotcha :)


To put back the material you snipped.

"Androgenesis has been observed in Cupressus dupreziana and Cupresssus sempervirens. I had thought that this was a case of plants being weird, but while googling up the species name I found a reference to a case in animals (several species of Corbicula); the paper is paywalled so I can't tell whether any other taxa are mentioned. However googling also finds references to its occurrence is some stick insects.

A 2008 blog post on the topic mentions just those three taxa.

<URL:
http://opinionator.blogs.nytimes.com/2008/09/23/evolving-the-single-daddy
/>"
--
alias Ernest Major

.

Relevant Pages

  • Re: The "fuel" of evolution
    ... >>Consider the case of a sexual species into which a parthenogenic female is ... Assuming that she and her immediate offspring ... Unless of course the mutation that causes parthenogenesis simultaneously ... Sexuality survives by default. ...
    (sci.bio.evolution)
  • Re: vertebrate speciation in the laboratory
    ... the same thing as clones of the parthenogenetic kind. ... offspring are clones of the parent there really is no other ... It's not parthenogenesis. ... It's not the male reproducing without ...
    (talk.origins)
  • Re: Did Darth Sidious create Anakin?
    ... Here's some of the excerpts of the articles on male offspring from ... these females can also give birth to male aphids without ... another instance of parthenogenesis that produces only male ...
    (alt.fan.starwars)
  • Re: The "fuel" of evolution
    ... >> offspring will effectively displace the sexual type in a few dozen ... advantage in terms of having more offspring - they invest less energy per ... offspring suffer higher rates of predation and especially disease. ... parthenogenesis does not have any advantage. ...
    (sci.bio.evolution)