Which of the following statements most accurately describes Down syndrome?

Question

Quizplus · Accepted Answer

Down syndrome is caused by an extra copy of chromosome 21, known as trisomy 21. This is the most common chromosomal abnormality in humans, affecting about 1 in every 700 live births. Choice A is incorrect as Down syndrome can affect both males and females. Choice B is incorrect as trisomy of chromosome 13 results in a different condition called Patau syndrome. Choice D is incorrect as it describes Turner syndrome, which is characterized by a missing or partially missing X chromosome in females.

Which of the Following Statements Most Accurately Describes Down Syndrome