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प्रश्न
A normal visioned woman whose father is colourblind married a normal visioned man. What are the probabilities of her sons or daughters to be colourblind? Explain with the help of Punnett square.
उत्तर
The genotype of woman - XCX (Carrier)
The genotype of man - XCY (Normal)
| Parents | Carrier woman | × | Normal man |
| Genotype | XCX | × | XCY |
| Gametes | XCX | XCY |
By Punnett's square :
 |
XC | Y |
 |
||
| XC | XCXC colourblind female |
XCY normal male |
| X | XCX carrier female |
XCY colourblind male |
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