Which genetic or chromosomal abnormality below is CORRECTLY matched with its description?
A) Phenylketonuria-the child cannot produce a critical enzyme,resulting in an accumulation of poisons,in turn causing mental retardation
B) Tay-Sachs disease-a genetic disease producing abnormal red blood cells
C) Down syndrome-a neurodegenerative disorder;the brain tissues of the cortex degenerates resulting in the death of the child
D) Sickle-cell anemia-the child receives an extra chromosome;mental retardation results

Question

Quizplus · Accepted Answer

Phenylketonuria is a genetic disorder in which the child cannot produce a critical enzyme needed to break down phenylalanine, which can result in an accumulation of poisons leading to mental retardation.

Answer: B
 Tay-Sachs disease is a genetic disorder that causes the accumulation of a fatty substance in the brain, resulting in neurological damage. It does not produce abnormal red blood cells.

Answer: C
 Down syndrome is a genetic disorder caused by the presence of an extra chromosome, resulting in physical and intellectual developmental delays. It is not a neurodegenerative disorder.

Answer: D
 Sickle-cell anemia is a genetic disorder in which red blood cells are abnormal in shape, leading to a reduced oxygen-carrying capacity and other health problems. It is not caused by an extra chromosome leading to mental retardation.

Which Genetic or Chromosomal Abnormality Below Is CORRECTLY Matched with Its