Fill in the Blank

question 18

Short Answer

Fill in the blank. In genetic screens, the chance of discovering a novel gene decreases as the screen proceeds. When the chance of finding a new gene is very low and the effort expended to discover a new gene is not justifiable, the screen has been _________.

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Definitions:

Limbs

Extremities of the body used for movement and interaction with the environment, such as arms and legs in humans.

Girdles

Structures that connect the limbs to the axial skeleton, including the pelvic girdle and shoulder girdle.

Rib Cage

The set of bones surrounding the chest that protects the heart and lungs.

Orbit

The bony cavity containing the eye, or alternatively, the path one object in space takes around another due to gravity.