As a result of a failure of the twenty-first pair of chromosomes to separate during meiosis, Aziz received three of these chromosomes rather than the normal two. Aziz has __________ syndrome.

Question

Quizplus · Accepted Answer

This scenario describes the condition of Down syndrome, which is caused by the presence of an extra copy of chromosome 21, rather than a problem with the sex chromosomes (X and Y). Klinefelter syndrome occurs in individuals with two X chromosomes and one Y chromosome, while Turner syndrome occurs in individuals with only one X chromosome. XYY syndrome occurs in individuals with an extra Y chromosome.

As a Result of a Failure of the Twenty-First Pair