Individuals with neurofibromatosis may have a range of phenotypes, from pigment spots on the skin to tumorlike growths. This is an example of

A) incomplete penetrance.
B) variable expressivity.
C) age of onset.
D) X-inactivation.
E) gene magnification.


B

Biology & Microbiology

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Pure water has a pH of 7.0, therefore, ____

a. [H+] < [OH-] b. [H+] = [OH-] c. [H+] = 0 d. [OH-] = 0 e. [H+] > [OH-]

Biology & Microbiology

Birds are most closely related to

A. crocodiles. B. snakes. C. mammals. D. non-avian dinosaurs. E. amphibians.

Biology & Microbiology

The property on which the acid-fast stain depends is:

a) affinity for basic dyes b) capability for reducing silver c) failure to stain with a dye other than basic fuchsin d) ability to resist decolorization with dilute acids

Biology & Microbiology

Only Photosystem I is required for (anoxygenic/cyclic/noncyclic) photophosphorylation to occur

What will be an ideal response?

Biology & Microbiology