If a stem cell divides asymmetrically, produce two types of cells (a stem cell & a developmentally committed cell) are produced at each division, is called the single stem cell asymmetry.

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#Id: 1071

#Unit 5. Developmental Biology

Arabidopsis that specify floral organ identity:

• APETALA1/ APETALA2

• APETALA3/PISTILLATA 

• AGAMOUS

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#Id: 1072

#Unit 5. Developmental Biology

Class A activity alone specifies sepals.

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#Id: 1073

#Unit 5. Developmental Biology

Class A and B activities are required for the formation of petals.

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#Id: 1074

#Unit 5. Developmental Biology

Class B and C activities form stamens.

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#Id: 1075

#Unit 5. Developmental Biology

Class C activity alone specifies carpels.

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#Id: 1076

#Unit 5. Developmental Biology

Many of the genes that determine floral organ identity are MADS box genes, including AG, PI, and AP3 genes of Arabidopsis