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Flower

Flower

The sexual reproductive structure of the angiosperms, typically consisting of gynoecium, androecium and perianth and the main stem bearing these parts.


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Re: Really puzzled with gene expresseion!!!!

Gene expression is managed by whether it's dominant or recessive. Unless it is incomplete dominance, then both are presented. For example, if a red flower is crossed with a white flower, the offspring will be pink flowers. If the inherited genes are codominant, both alleles are completely expressed, ...

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by star4ysh
Sun Apr 26, 2009 7:12 pm
 
Forum: Genetics
Topic: Really puzzled with gene expresseion!!!!
Replies: 4
Views: 216

alternation of generations in mosses/ferns (haploid/diploid)

... to spores. In mosses, the actual plant that you see is the gamethophyte, whereas the sporophyte is just the thing that looks somewhat like a small flower, is a parasite on the gamethophyte and is basically an urn full of spores. In ferns, the gametophyte is reduced a lump of cells called the prothallus, ...

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by MrMistery
Wed Apr 22, 2009 1:54 pm
 
Forum: Botany Discussion
Topic: alternation of generations in mosses/ferns (haploid/diploid)
Replies: 2
Views: 373

35S Promoter question

Hello, I have a problem with a review concerning Arabidopsis flower induction. TEM and CO are two antagonist genes : CO activates flowering, TEM represses flowering. The authors use 35S::TEM1/+ 35S::CO plants and say they flower at an intermediate time ...

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by Jelly
Mon Apr 13, 2009 4:42 pm
 
Forum: Genetics
Topic: 35S Promoter question
Replies: 0
Views: 237

Role of animals in the ecosystem

... much of our farming would collapse. Wind-pollinated grains would continue to provide staple food, but artificial pollination of each and every flower would be needed to maintain standard crops. That's the real source of the nigh-extinction scenario. However, given a few years of developing ...

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by onetruecathal
Tue Feb 24, 2009 12:38 pm
 
Forum: Zoology Discussion
Topic: Role of animals in the ecosystem
Replies: 6
Views: 885

Re: Alternation of generation

... 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 ...

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by sagda
Thu Jan 29, 2009 5:10 pm
 
Forum: Botany Discussion
Topic: Alternation of generation
Replies: 6
Views: 1755
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