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Down Syndrome

If one of the...

Question

If one of the two mono zygotic twin sibling had colour blindness what are the chance of other sibling being colour blind?

A

25%

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B

50%

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C

75%

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D

100%

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Solution

The correct option is C 100%
Mono zygotic twins are one who has been born as twin from single zygote getting split into two zygote due to certain environmental disorder. Mono zygotic twins have identical genetic makeup. If one sibling or the mono zygotic twin is colourblind then the other sibling also has to be colourblind.

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