Re: Reproductive Selection



John Harshman wrote:

<snip>

In other words, how do the novel features of R(S2,x), meaning the
reproductive compatibility particular to S2, originate when the
relevant differences between S1 and S2 can't be accounted for by
genetic drift alone?

Reproductive compatibility doesn't arise. This idea of "novel features
of R(S2,x)" is meaningless. At most, it's maintained by the absence of
incompatible genes. Compatibility within a population does not require
this "backward-compatibility" you keep talking about, as; the 2-allele
model shows. Why do you keep ignoring it?

If R(S2,x)>R(S1,x) for *any* x, then where did that new functionality
of S2 with respect to S1 come from, if not drift or reproductive
selection?

It's not functionality. It's just a consequence of having compatible
genomes. Do you understand that the 2-allele model features neither
drift nor "reproductive selection"? And yet it maintains compatibility
within populations while producing incompatibility between populations.

The two allele model does not sufficiently account for the complete
set of traits uniquely necessary to the RC of a population arbitrarily
different from whatever ancestor is taken as the starting point.

.

Relevant Pages

  • Re: Reproductive Selection
    ... Reproductive compatibility doesn't arise. ... of S2 with respect to S1 come from, if not drift or reproductive ... The two allele model does not sufficiently account for the complete ...
    (talk.origins)
  • Re: Reproductive Selection
    ... You are implicitly denying that reproductive compatibility is ... You've been shown numerous examples of a population maintaining reproductive compatibility with itself while losing reproductive compatibility with its ancestor population. ... Please give us an example of two reproductively incompatible populations where you think the incompatibility can not have evolved. ... Significant evolutionary change requires that mutations interacting ...
    (talk.origins)
  • Re: Reproductive Selection
    ... Compatibility within a population does not require ... of S2 with respect to S1 come from, if not drift or reproductive ... Consider, again, the other model, where "incompatability" at each ... for enough small increments, incompatabilities can be arbitrarily ...
    (talk.origins)
  • Re: "Species"? Feces!
    ... by itself completely stops mutual compatibility. ... However, the incompatibility would not ... When a chromosome in a gamete splits cleanly, ...
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  • Re: Reproductive Selection
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    (talk.origins)
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