A cell is determined to a given fate if it maintains its developmental maturation toward this cell type even when placed in a new environment (commitment is irreversible).

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#Id: 709

#Unit 3. Fundamental Processes

A locus called dat has a large concentration of DnaA-binding sites. It binds about 80 more DnaA molecules than the origin.

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#Id: 6961

#Unit 8. Inheritance Biology

TRANSLOCATIONS IN MEIOSIS The effect of a translocation on chromosome segregation in meiosis depends on the nature of the translocation.

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#Id: 3515

#Unit 2. Cellular Organization

A mutation that confers a more advantageous phenotype to an organism, relative to Individuals in the same population without the mutation, is positive selection of that organism.

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#Id: 4706

#Unit 11. Evolution and Behavior

A female vampire bat will regurgitate food to an unrelated female if needed, because at other times she may be the recipient of such a meal.

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#Id: 912

#Unit 13. Methods in Biology

The MTT assay can measure cell proliferation or cell death.