DOWN SYNDROME Also known as trisomy 21, is the most common autosomal aneuploidy in humans About 75% of the nondisjunction events that cause Down syndrome are maternal in origin, most arising in meiosis I. 

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#Unit 3. Fundamental Processes

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#Unit 2. Cellular Organization

Phalloidin 

isolated from Amanita phalloides, binds at the interface between subunits in F-actin, locking adjacent subunits together and preventing depolymerization.

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#Unit 13. Methods in Biology

In a chiral medium the molar absorptivity of LCP and RCP light are different so they will be absorbed by the medium in different amounts. 

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#Unit 12. Applied Biology

Cell viability is calculated as the number of viable cells divided by the total number of cells.

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#Unit 4. Cell Communication and Cell Signaling

Development of T cells from hematopoietic stem cells on bone marrow stromal cells expressing the Notch ligand.