barr body การใช้

• Barr bodies can be seen on the nucleus of neutrophils.
• Richards finally agreed to take the Barr body test.
• Males do not have Barr bodies as they only have one X chromosome.
• Xist will be continuously created to maintain a condensed and silenced Barr body.
• The actions of Xist serve to create a Barr body in the cell.
• The inactive X forms a discrete body within the nucleus called a Barr body.
• Serious study of calico cats seems to have begun about 1948 when Barr bodies.
• This phenomenon is called X-inactivation or Lyonization, and creates a Barr body.
• In 1959, Japanese cell biologist Susumu Ohno determined the Barr bodies were X chromosomes.
• In the past, the observation of the Barr body was common practice as well.
• The inactivated X becomes a Barr body.
• The inactive X chromosome is packed via DNA condensation into a heterochromatic Barr body formation.
• This heterochromatin greatly reduces, if not completely silences gene expression of the Barr body.
• He called these structures Barr bodies after one of the investigators who originally documented their existence.
• The inactive X chromosome in cells of females is visible as a Barr body under the microscope.
• However, recent research suggests that the Barr body may be more biologically active than was previously supposed.
• The Barr body is indicated by the arrow, it identifies the inactive X ( Xi ) . ]]
• These condensed structures can be seen as dark bodies under the microscope and are commonly referred to as Barr bodies.
• These changes help inactivate gene expression on the inactive X-chromosome and to bring about its compaction to form the Barr body.
• It is thought that this constitutes the mechanism of choice, and allows downstream processes to establish the compact state of the Barr body.