Login

Join for Free!
119231 members


Centromeres

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

Postby TheVirus » Wed Nov 04, 2009 3:43 am

Yeah, that would be my thought. Until proven wrong.
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin
User avatar
TheVirus
Coral
Coral
 
Posts: 188
Joined: Sun Nov 01, 2009 4:23 pm

Postby JackBean » Wed Nov 04, 2009 5:36 am

Can you tell me, how the centromere will break? Do you know, what does the centromere look like?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5692
Joined: Mon Sep 14, 2009 7:12 pm

Postby TheVirus » Wed Nov 04, 2009 5:20 pm

Yeah, that would be my thought.
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin
User avatar
TheVirus
Coral
Coral
 
Posts: 188
Joined: Sun Nov 01, 2009 4:23 pm


Re:

Postby JackBean » Thu Nov 05, 2009 5:07 am

TheVirus wrote:Yeah, that would be my thought.

What would be your thought? Did you read it? :roll:
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5692
Joined: Mon Sep 14, 2009 7:12 pm

Postby TheVirus » Thu Nov 05, 2009 11:45 pm

TheVirus wrote:Yeah, that would be my thought. Until proven wrong.

Oh, sorry, i thought these reply of mine above hadn't been posted properly so i posted it again.
Centromeres aren't circles like they're drawn in the books, they're just repetitie DNA sequences, and they look just like any other part of the chromosome... like DNA. And i'm guessing they get separated when the centrioles pull each chromosome's chromatid away in opposite directions through the nuclear spindles (which are like strings that hook to each chromatid).
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin
User avatar
TheVirus
Coral
Coral
 
Posts: 188
Joined: Sun Nov 01, 2009 4:23 pm

Postby Darby » Fri Nov 06, 2009 3:36 pm

There's a chemical change that causes the centromeres to separate. In cells with spindle formation inhibited, the centromeres still separate.
Darby
Viper
Viper
 
Posts: 1265
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Postby TheVirus » Fri Nov 06, 2009 5:21 pm

Really? Does that happen in some cells of all organisms, or do you mean that some species have inhibited spindle formation in all their cells? If you mean the second, do you know any example of species?
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin
User avatar
TheVirus
Coral
Coral
 
Posts: 188
Joined: Sun Nov 01, 2009 4:23 pm

Postby Darby » Mon Nov 09, 2009 1:53 am

There's a chemical that inhibits microtubule formation. I've seen video of a cell dividing after being exposed to it - the chromosomes just drift around, and then they all kind of pop apart at the same time.
Darby
Viper
Viper
 
Posts: 1265
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Postby TheVirus » Mon Nov 09, 2009 3:25 am

Oh, but that's not a natural chemical, right? I mean, it's not something produced by the cell itself, but in the lab, right?
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin
User avatar
TheVirus
Coral
Coral
 
Posts: 188
Joined: Sun Nov 01, 2009 4:23 pm

Previous

Return to General Discussion

Who is online

Users browsing this forum: No registered users and 8 guests