Re: Re: HYB: spots (was another terminology question)
iris@hort.net
  • Subject: Re: Re: HYB: spots (was another terminology question)
  • From: C* C* <i*@aim.com>
  • Date: Wed, 27 Feb 2013 11:41:25 -0500 (EST)
Paired as in joined at centromere, in meiosis, or paired as in this is the equivalent chromosome from two different species. A very, very important distinction. A picture of chromosomes, side by side like this is designed to show how they DON'T and CAN'T join, and the picture shows why. But you need a good knowledge of genetics to interpret this sort of picture. 

Chuck Chapman

-----Original Message-----
From: Linda Mann <lmann@lock-net.com>
To: iris <iris@hort.net>
Sent: Wed, Feb 27, 2013 2:53 am
Subject: Re: [iris] Re: HYB: spots (was another terminology question)

What Tom said.

;-)
Seriously, I couldn't remember the details, but that's more or less what 
I got from discussions with Sharon and Tom here way back when re: the
weirdiploids.

In the article Sharon copied for me, it showed illustrations of paired
chromosomes from all(?) the bearded iris "species" (and hybrids?) known
at the time, and how the arms don't match in quite a few of them. I think. 

On 2/26/2013 11:06 AM, Chuck Chapman wrote:
There can't be cross overs between any chromosome from 8 set and 12 
set,

as they never pair up in meiosis. Crossovers only occur in paired
chromosomes. No pairs = no crossovers. Like, never ever.


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