Re: volution?and faith and Re:darwin's fish:follow me:read
john queen (john.queen.ii@mail.utexas.edu)
Thu, 12 Jun 1997 23:51:49 -0500>Date: Thu, 12 Jun 1997 23:51:10 -0500
>To: "Pim van Meurs" <entheta@eskimo.com>
>From: john queen <john.queen.ii@mail.utexas.edu>
>Subject: Re: volution?and faith and Re:darwin's fish:follow me:read close
>In-Reply-To: <866151846-0-entheta@mail.eskimo.com>
>
>---Why would the chances of reverse mutation be any smaller than the
chances for the mutation in the first place?
>Random right.
> jq
>
>At 05:44 PM 6/12/97 -0400, you wrote:
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>>---Steve, I appreciate your reply.
>>JQ: Are there examples of whole sequences of DNA being mutated at
>>the same time? If there are, I wonder what the next round of mutations
>>might do to this sequence. If there was a second round.
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>>Most mutations appear to be base-pair substitutions or base-pair
>>insertions. I do not know if there is data on multiple mutations at the
>>same time. I do remember some discussion of doubling.
>>I found a reference to a change that involves gross reorganization of the
>>genetic material: 1) Inversion 2) deletion, reciprocal translocation and
>>fusion.
>>There is no predictability of a random process btw.
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>>JQ: If the new gene was fixed in the genome what protects this new gene
>>from
>>the same mutations that got it there?
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>>Nothing, other than if the mutation has a selective advantage organisms
>>with the mutation might have an advantage over those without the mutation.
>>But the chances of a reversal of a mutation are quite small.
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