Question
Describe the structure of sex-chromosomes.
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| No. | Syndrome | Cause | Characteristics of affected individual | 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 OX |
‘e’ (i)
(ii)
|
‘f’ |

|
S. No.
|
Component-I
|
Component-II
|
Chemical linkage bonding the two components
|
Product
|
|
(i)
|
A
|
B
|
C
|
Nucleotide
|
|
(ii)
|
Nucleotide
|
D
|
E
|
Nucleotide
|
|
(iii)
|
Nucleotide
|
Nucleotide
|
F
|
Dinucleotide
|