Regardless of how many X chromosomes are present, all but one will be inactivated. 

In normal females there are of course two X chromosomes, but in rare cases where nondisjunction has generated a 3X or greater genotype, only one X chromosome remains active

TLS Online TPP Program

#Id: 4680

#Unit 13. Methods in Biology

What are the principles in flow cytometry?

Light scattered by a laser or arc lamp

Specific fluorescence detection

Hydrodynamically focused stream of particles

Electrostatic particle separation for sorting

Multivariate data analysis capability

TLS Online TPP Program

#Id: 4681

#Unit 13. Methods in Biology

3H thymidine uptake assays were the first to be used routinely to measure cell division in lymphocyte cultures.

TLS Online TPP Program

#Id: 4682

#Unit 13. Methods in Biology

Colorimetric Assays for Cell Division Are Rapid and Eliminate the Use of Radioactive Isotopes

TLS Online TPP Program

#Id: 4683

#Unit 13. Methods in Biology

Colorimetric Assays for Cell Division Are Rapid and Eliminate the Use of Radioactive Isotopes

TLS Online TPP Program

#Id: 4684

#Unit 13. Methods in Biology

Bromodeoxyuridine-Based Assays for Cell Division Use Antibodies to Detect Newly Synthesized DNA

TLS Online TPP Program

#Id: 2554

#Unit 13. Methods in Biology

Fluorescent probes are commonly used to detect rapid biochemical changes in single living cells