Assume Eight Different Strains of Fly Have Been Isolated, Each

question 55

Multiple Choice

Assume eight different strains of fly have been isolated, each shows a recessive white eye trait.Crosses are performed as follows (w) indicates white-eyed progeny, (R) indicates wild-type red eyes. Based on these crosses, how many different genes are present and what strains have mutations in the same gene as does strain A?

• A)2, B, E, and H
• B)3, B, and C
• C)3, B, C, and H
• D)3, B, E, and H
• E)4, B, and H

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Definitions:

Doll's Head Maneuver

A neurological test that assesses the vestibulo-ocular reflex, involving movement of the head and observation of eye movements.

Periodic Breathing

A pattern of breathing typically seen in newborns, characterized by pauses in breathing for up to 10 seconds followed by a series of rapid breaths.

Increased ICP

Elevated intracranial pressure, a condition where the pressure inside the skull exceeds normal levels, potentially leading to serious neurological symptoms and damage.

Cerebral Edema

An accumulation of excess fluid in the brain, leading to increased intracranial pressure and potentially life-threatening complications.