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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’ |
‘b’ |
| 2. | ‘c’ | XXY | Overall masculine development | ‘d’ |
| 3. | Turner’s | 45 with XO |
‘e’ |
‘f’ |
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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 |
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