Download Learnerz IAS app from the Play Store now! Download



X Chromosome UPSC NOTE

 Why in news

  • The molecular coating of the X chromosome is crucial to a process called X-chromosome inactivation which ensures that one set of X chromosomes in females remains active and functional in all the cells of the body while the other is muffled.

  • In recent times several international celebrities have spoken up about their diagnosis and subsequent struggles with autoimmune diseases

  • A majority of these celebrities are women

  • This bias is not just a fluke of nature but a reflection of a worldwide phenomenon

  • A 2023 study by the University of Oxford stated that about 10% of the population they had studied had autoimmune diseases of which 13% were women and 7% were men.

What is X chromosome 

  • The X chromosome is one of the two sex chromosomes found in humans and many other mammals. 

Sex determination:

  • Females typically have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY).

  • The presence or absence of the Y chromosome is the primary determinant of biological sex.

Genetic information:

  • The X chromosome carries a large number of genes (around 900-1400), responsible for various functions like:

Brain development and cognitive function

  • Vision

  • Smell

  • Blood clotting

  • Immunity

  • And many other essential processes

Unique features:

  • In females, one of the two X chromosomes is randomly inactivated in most cells (except egg cells) through a process called X-inactivation

  • This ensures females typically only express one copy of X-linked genes, similar to males.

  • The X chromosome is larger than the Y chromosome and contains more genes.

  • Certain regions of the X and Y chromosomes share similar genes (pseudoautosomal regions), leading to males having two functional copies of these genes while females only have one.



Amritsar,1,April 2024,117,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: X Chromosome UPSC NOTE
X Chromosome UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content