You examine the chromosomes from a somatic cell nucleus of a human individual.That nucleus contains a Y chromosome and a Barr body.Which of the following is ACCURATE?
A)The individual is a female because there is a Barr body
B)The individual is a male because there is a Y chromosome
C)The individual has Klinefelter Syndrome
D)The individual is a male with Klinefelter Syndrome
E)The individual is a female with Klinefelter Syndrome

Question

Quizplus · Accepted Answer

The presence of a Y chromosome indicates that the individual is male, and the presence of a Barr body suggests that there is a second X chromosome that has been inactivated. This combination could be seen in individuals with Klinefelter Syndrome, which occurs when a male has an extra X chromosome (XXY genotype), and one of the X chromosomes is inactivated to form a Barr body. Therefore, choice D is the most accurate option.

You Examine the Chromosomes from a Somatic Cell Nucleus of a Human