Which one of the following statements is wrong with reference to Barr bodies

Options

A. The heterochromatinised X-chromosome is called Barr body
B. The inactivation of X-chromosome is called Lyonisation
C. The extra X-chromosome undergoes heterochromatinisation and becomes active during early embryonic development
D. The heterochromatinised X-chromosome remains attached to the nuclear membrane

Answer

C

Explanation

The extra X-chromosome although change into barr body in somatic cells, But it becomes active in later stages of life. Genetic balance between male and female is maintained by inactivation of X-chromosome.This one chromosome undergoes heterochromatisation in all somatic cells. But, it becomes active in germ cells, producing female gemetes