Huntington's disease,a fatal degenerative movement disorder,results from large numbers of codon repeats in the Huntington gene located on chromosome 4. This means that the
A)extra codon repeats will not impact the individual's phenotype.
B)affected Huntington gene will be silenced, producing no protein.
C)affected Huntington gene will produce a protein with abnormally large amounts of the amino acid encoded by the extra codons.
D)affected Huntington gene will produce a protein with abnormally small amounts of the amino acid encoded by the extra codons.

Question

Huntington's disease,a fatal degenerative movement disorder,results from large numbers of codon repeats in the Huntington gene located on chromosome 4. This means that the​ 
A)extra codon repeats will not impact the individual's phenotype. 
B)affected Huntington gene will be silenced, producing no protein. 
C)affected Huntington gene will produce a protein with abnormally large amounts of the amino acid encoded by the extra codons. 
D)affected Huntington gene will produce a protein with abnormally small amounts of the amino acid encoded by the extra codons.

Quizplus · Accepted Answer

The extra codon repeats will result in the production of a protein with abnormally large amounts of the amino acid encoded by the extra codons. This abnormal protein is believed to be toxic to cells, leading to the degeneration and death of neurons in the brain. This is what causes the symptoms of Huntington's disease.

Huntington's Disease,a Fatal Degenerative Movement Disorder,results from Large Numbers of Codon