A Gene Mutation

question 9

Multiple Choice

A gene mutation

• A) is a change in the nucleotide sequence of DNA.
• B) may be caused by environmental agents.
• C) may arise spontaneously.
• D) can occur in any organism.
• E) is described by all of these.

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Definitions:

Recessive Allele

A variant of a gene that must be inherited from both parents to be expressed in the offspring's phenotype.

Tay-Sachs Disease

A genetic disorder that results in the destruction of nerve cells in the brain and spinal cord, leading to severe neurological impairment and early death.

Seizures

Sudden, uncontrolled electrical disturbances in the brain, leading to changes in behavior, movements, feelings, and levels of consciousness.

Degenerating Motor

A motor or mechanism that is in decline or failing in performance, often due to wear, age, or damage.