Q. 21 trisomy in humans causes

A) Klinefelter’s syndrome
B) Down’s syndrome
C) Tumer’s syndrome
D) Patau’s syndrome
Explanation

Disorders Autosomal/Sex Linked Symptoms Down’s syndrome Autosomal aneuploidy (trisomy, +21) Mongolian eyefold (epicanthus), open mouth, protruded tongue, projected lower lip, many loops on finger tip, palm crease Turner’s syndrome Sex chromosomal monosomy 44 + XO Short stature females (<5’), webbed neck, body hair absent menstrual cycle absent. Sparse pubic hair, underdeveloped breasts narrow lips puffy fingers Ste he pr Klinefelter’s syndrome Sex chromosomal aneuploidy (tri/tetrasomy of X chromosome) 44+XXY 44+XXXY The males are tall with long legs, testes small, sparse body hair, Barr body present, breast enlargement Gy ia ste

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.