39) A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. They have two normal daughters. What is the probability of their grandson being colour blind?
a) 1 b) Nil c) 0.25 d) 0.5
Ans. is C...but how???
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Take this as the scenario as with the tall and short plants. Here, colour blindness is the recessive trait normal sight is the dominant one.
mannatsiddiqui15:
but it is asking about grandson
grandson is the second generation.
see....in childrens of their carrier daughter ,,, 1 boy is affected out of 2
so probability will be 1/2
read the tall and short plant experiment by mendel. you'll understand
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answer is C because of dite or any definey
??????
my friend say this answer only sorry
my friend say this answer only
sorry
for rong answer
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