Please answer question b) 1 2 3 4
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Please find your answers below:
4) Colour blindness is X-linked recessive disorder because of which a person is not able to distinguish between some of the colours, which other people can recognise easily.
In this disease, females become affected only when they carry a gene for colour blindness on both X chromosomes and become carrier when they contain affected gene on only one X chromosome.
The male gets affected when he carries affected gene on its X chromosome.
Hence, the genotype of affected female will be XC XC , carrier female will be XCX and affected male will be XC Y. This can be depicted by the following cross:
Parents XC XC X XCY
Gametes XC XC Y
Offsprings XCXC XCY
Affected female Affected male
child child
1) Mother is the carrier of the disease. Father is affected by the disease.
2) One child is normal (XY). One is carrier (XXc). Two children are affected (XcY and XcXc).
3) Male child having XY genotype is normal. Male child having XcY genotype is affected.
Regards
Please find your answers below:
4) Colour blindness is X-linked recessive disorder because of which a person is not able to distinguish between some of the colours, which other people can recognise easily.
In this disease, females become affected only when they carry a gene for colour blindness on both X chromosomes and become carrier when they contain affected gene on only one X chromosome.
The male gets affected when he carries affected gene on its X chromosome.
Hence, the genotype of affected female will be XC XC , carrier female will be XCX and affected male will be XC Y. This can be depicted by the following cross:
Parents XC XC X XCY
Gametes XC XC Y
Offsprings XCXC XCY
Affected female Affected male
child child
1) Mother is the carrier of the disease. Father is affected by the disease.
2) One child is normal (XY). One is carrier (XXc). Two children are affected (XcY and XcXc).
3) Male child having XY genotype is normal. Male child having XcY genotype is affected.
Regards