What phenomenon occurs in females as a result of x-chromosomes inactivation

This happens early in embryonic development in females, where one of the two X-Chromosomes is randomly (and permanently) inactivated, as you said, in cells other than egg cells.

This phenomonon is actually called X-Inactivation.

X-Inactivation make sure that females, just like males, have a single functional copy of the X Chromosome in each and every one of their cells in their body.

Glad I could help, byee now

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

its temperature is increasing. this causes molecular vibrations to increase.