An X Chromosome That Has Been Inactivated Becomes A(an)___________ in Female

Question

An X chromosome that has been inactivated becomes a(an)___________ in female mammals.
A) Barr body
B) Oncogene
C) Bacteriophage
D) All of these
E) None of these

Accepted Answer

When an X chromosome is inactivated, it condenses and forms a dense region called the Barr body, which is visible under a microscope. Therefore, the correct answer is A - Barr body. Choices B, C, and D are incorrect as they are unrelated to X chromosome inactivation.