In the absence of Cerberus, Nodal is not activated and thus Pitx2 is not expressed

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#Id: 6234

#Unit 8. Inheritance Biology

Expressivity

Degree to which a trait is expressed.

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#Id: 1066

#Unit 5. Developmental Biology

The FT-FD complex activates the expression of SOC1 and AP1.

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#Id: 5781

#Unit 7. System Physiology – Animal

Each spherical follicle is surrounded by a single layer of polarized epithelial cells and filled with pink-staining proteinaceous material called colloid.

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#Id: 910

#Unit 13. Methods in Biology

Diphenyltetrazolium bromide, a yellow tetrazole is reduced by metabolically active cells to form insoluble, purple formazan dye crystals detected at 570nm

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#Id: 8848

#Unit 2. Cellular Organization