Answer :
The question is incomplete as it lacks the multiple options. The multiple options has been attached below.
Answer:
X - inactivation.
Explanation:
The chromosome contains the dark and light stained regions known as heterochromatin and euchromatin regions. The euchromatin regions are highly active region that undergoes the translation whereas heterochromatic regions are non transcribed inactive regions.
Females have two X chromosome whereas males have single X chromosomes. The single X chromosome in females gets inactivated randomly and this might also affect the phenotype of the organisms. The female cats are have different color due to the inactivation of random X chromosome. The males does not have any fur color.
Thus, the correct answer is X - inactivation.