Question

select the sex chromosome pair in the karyotype of a healthy individual shown.

Explanation:

In a karyotype, the sex chromosomes are the last pair. In humans, females typically have an XX pair and males an XY pair. Looking at the labeled "X" and "Y" at the bottom right of the karyotype image, the sex chromosome pair is the one with these labels.

Answer:

The sex chromosome pair is the one labeled "X" and "Y" at the bottom - right of the karyotype.