Barr body in mammals represents :

Question

Barr body in mammals represents : (A) all the heterochromatin in female cells (B) one of the two X - chromosomes in somatic cells of females (C) all the heterochromatin in male and female cells (D) the Y - chromosome in somatic cells of male

Tardigrade Admin · Accepted Answer

In a normal female, one of the two X- chromosomes becomes heterochromatic and appears as Barr body. This inactivation of one of the two X-chromosomes of a normal female is called dosage compensation or Lyons hypothesis.

Q. Barr body in mammals represents :

all the heterochromatin in female cells

one of the two X - chromosomes in somatic cells of females

all the heterochromatin in male and female cells

the Y - chromosome in somatic cells of male

In a normal female, one of the two X- chromosomes becomes heterochromatic and appears as Barr body. This inactivation of one of the two X-chromosomes of a normal female is called dosage compensation or Lyons hypothesis.