Login

Join for Free!
118888 members


Alternation of generation

Plants!

Moderator: BioTeam

Alternation of generation

Postby sagda » Mon Jan 26, 2009 10:04 am

Do flowering plants reproduce by "Alternation of generation"? If so, How?
sagda
Garter
Garter
 
Posts: 5
Joined: Mon Jan 26, 2009 9:55 am

Postby MrMistery » Mon Jan 26, 2009 3:58 pm

do you know what alternation of generations means?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: Alternation of generation

Postby plasmodesmata11 » Mon Jan 26, 2009 11:04 pm

Yes, angiosperms go through the alternation of generations. The primary stage is the sporophyte with an incredibly small, nutritionally dependent gametophyte stage that is located in the flower. Check out this link for a full diagram and explanation: http://ecology.botany.ufl.edu/ecologyf03/apomixis.html
plasmodesmata11
Coral
Coral
 
Posts: 198
Joined: Sun Nov 30, 2008 3:51 am
Location: University of Rhode Island


Re: Alternation of generation

Postby sagda » Thu Jan 29, 2009 5:10 pm

plasmodesmata11 wrote:Yes, angiosperms go through the alternation of generations. The primary stage is the sporophyte with an incredibly small, nutritionally dependent gametophyte stage that is located in the flower. Check out this link for a full diagram and explanation: http://ecology.botany.ufl.edu/ecologyf03/apomixis.html

Thank you very much, this link is very useful to me.
sagda
Garter
Garter
 
Posts: 5
Joined: Mon Jan 26, 2009 9:55 am

Re:

Postby sagda » Thu Jan 29, 2009 5:23 pm

MrMistery wrote:do you know what alternation of generations means?
Yes, I do. I was just confused...
sagda
Garter
Garter
 
Posts: 5
Joined: Mon Jan 26, 2009 9:55 am

Postby asker94 » Sat May 02, 2009 8:09 am

alternation of generation is only in pteridophytes(seedless).Spermatophytes(gymnosperms and angiosperms) don't exibit alternation of generation
asker94
Garter
Garter
 
Posts: 3
Joined: Sat May 02, 2009 7:48 am

Postby MrMistery » Sun May 03, 2009 3:12 am

alternation of generations is a stupid term anyway, because they are the same generation. and it does exist everywhere, it's just that in spermatophytes the haploid part of the life cycle is reduced to only a few cells.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby kika » Tue Aug 02, 2011 10:36 am

For sexually reproducing multicellular organisms such as plants and animals, the life cycle requires that diploid cells divide by meiosis to create haploid cells. Haploid cells then fuse to recreate the diploid number and a new organism. Alternation of generations refers to the occurrence in the plant life cycle of both a multicellular diploid organism and a multicellular haploid organism, each giving rise to the other. This is in contrast to animals, in which the only multicellular phase is the diploid organism (such as the human man or woman), whereas the haploid phase is a single egg or sperm cell.
read more: http://www.biologyreference.com/A-Ar/Al ... tions.html
kika
Garter
Garter
 
Posts: 2
Joined: Tue Aug 02, 2011 10:31 am

Re:

Postby JackBean » Tue Aug 02, 2011 10:45 am

kika wrote:Alternation of generations refers to the occurrence in the plant life cycle of both a multicellular diploid organism and a multicellular haploid organism, each giving rise to the other.

Really? And I thought that in higher plants, the haploid part is only the reproductive part of plant
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm


Return to Botany Discussion

Who is online

Users browsing this forum: No registered users and 0 guests