Home / Topic / Sex-linked inheritance
Topic

Sex-linked inheritance

Asked 4 times in CSE over 13 years (1981–1994), peaking in 1981.
4
PYQs
1
Exams
4
Years active
1981–1994
Span
1981
Peak
4/4
Answers
📅 Full chronological timeline →

Key insights

  • Most tested in CSE — 4 of 4 PYQs
  • Most asked in 1981
  • Recurs across 4 years (1981–1994)

Across exams

CSE · 4

How the concept evolved

181
185
193
194
Largely a pre-2016 idea — watch for a comeback.

Related concepts

Ideas UPSC tests alongside this one — keep exploring.

Sample questions

You've seen the pattern — here are a few of the actual PYQs.
CSE1994
Which one of the following is caused by the expression of a recessive gene present on sex chromosome?
  1. A Rheumatism
  2. B Nervous shock
  3. C Muscular dystrophy ✓
  4. D Cerebral hemorrhage
✓ Correct answer: (C)
Science & Technology › Biology & Health
CSE1993
Haemophilia is a hereditary disease carried by
  1. A females and expressed by females
  2. B females and expressed by males ✓
  3. C males and expressed by females
  4. D males and expressed by males
✓ Correct answer: (B)
Science & Technology › Biology & Health
CSE1985
Sex chromosomes transmit which of the following diseases?
  1. A Myopia
  2. B Colour blindness ✓
  3. C Longsightedness
  4. D Night blindness
✓ Correct answer: (B)
Science & Technology › Biology & Health

Study how UPSC repeats — not just the papers

₹199 / 1 year · Founding Member

Full access unlocks the three things no PYQ PDF gives you:
① Cross-exam learning — see the same idea recur across CSE, CAPF, CDS and NDA.
② Topic evolution — how each idea is framed, year by year.
③ Question intelligence — every PYQ + answer, linked to related concepts and similar questions.

e.g. Round Table Conference: CDS 2017 → CSE 2017 → … → CAPF 2024

15 days free, no card required — then ₹199 for 1 year.

Start your 15-day free trial →
CrispUPSC · YouTube · Telegram · About · What’s New · invite-only beta
💬 Feedback

Send feedback