In dogs, brown fur color (B) is dominant to white (b). A cross is made between t

Question

In dogs, brown fur color (B) is dominant to white (b). A cross is made between two heterozygous brown dogs. If a litter of puppies from these parents contains 5 puppies, what is the probability that 3 out of the 5 will be white? (Note, this is an unordered outcome and each puppy is independently fertilized). Give your answer as a percentage (do NOT type the % sign). Type only the number rounded to the nearest whole percentage point (thus your answer should be a whole number with no decimal). There is a range of accepted answers so you do not have to worry about rounding variabilities.

Explanation / Answer

B- Brown dominant

b - white recessive.

Bb x Bb

BB, Bb, Bb, bb

Probability of getting a white puppy is 1/4 and probability of getting a white puppy is 3/4.

Probability of getting 3 out of 5 white puppy is

1/4 x 1/4 x 1/4 x 3/4 x 3/4.= 9/1024 = 0.008 x 100 = 0.87 =0.9

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