Question

31. The family of this child is working with a geneticist to determine what condition the child has. The geneticist determined that the child has the karyotype shown below.Which of the following would be the most likely diagnosis for the child?A. This child is a female with Down syndrome.B. This child is a female with Turner syndrome.C. This child is a male with Turner syndrome.D. This child is a male with Down syndrome.

Answer 1

We can see that this karyotype corresponds to a male, since we can see there's an X chromosome, and a Y chromosome (XY); would be XX if the individual was female. At the 21 position, we can see three chromosomes, instead of two, for this reason, we can say that this child has trisomy 21.

Having this clear, the correct answer is the D option: "this child is a male with Down syndrome".