Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below: S. No. Syndrome Cause Characteristics of affected individuals Sex (male/female/both) 1. Down’s Trisomy of 21 ‘a’(i) ..., (ii) ... ‘b’ 2. ‘c’ XXY Overall masculine development ‘d’ 3. Turner’s 45 with XO ‘e’(i) ..., (ii) ... ‘f’

No Syndrome Cause Characteristics of affectedindividuals Sex/Male/Female/Both 1. Down’s Trisomy of21 (i) Broad forehead (ii) Permanently open mouth, protruding and furrowed tongue and projecting lower lip. Both 2. Klinefelter’s XXY Overall masculine development Male 3. Turner’s 45 with XO (i) Poorly developed ovaries, webbed neck, broad chest with under developed breasts and below average intelligence. (ii) Body hair absent Female

Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below: Syndrome Down’s ‘c’ Turner’s Cause Trisomy of 21 XXY 45 with XO Characteristics of affected individuals - Biology

Question

Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below:

S. No.	Syndrome	Cause	Characteristics of affected individuals	Sex (male/female/both)
1.	Down’s	Trisomy of 21	‘a’ (i) ..., (ii) ...	‘b’
2.	‘c’	XXY	Overall masculine development	‘d’
3.	Turner’s	45 with XO	‘e’ (i) ..., (ii) ...	‘f’

Classify

Solution

No	Syndrome	Cause	Characteristics of affected individuals	Sex/Male/Femal e/Both
1.	Down’s	Trisomy of 21	(i) Broad forehead (ii) Permanently open mouth, protruding and furrowed tongue and projecting lower lip.	Both
2.	Klinefelter’s	XXY	Overall masculine development	Male
3.	Turner’s	45 with XO	(i) Poorly developed ovaries, webbed neck, broad chest with under developed breasts and below average intelligence. (ii) Body hair absent	Female