Question

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

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'

Answer 1

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) Short statured females with webbed neck (ii) Body hair absent	Female