Choose the correct answer from the alternatives given.

In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed. What percentage of the progeny would have black coats?

25%

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50%

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75%

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100%

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Solution

The correct option is C 75%
The cross between black mouse (BB) and a brown mouse (bb) and the inbreeding of their hybrid progeny is shown below.
Hence, phenotypic ratio is 3 black: 1 brown i.e. 75% of the progeny would have black coat.

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Choose the correct answer from the alternatives given.In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed. What percentage of the progeny would have black coats?

The correct option is C 75%The cross between black mouse (BB) and a brown mouse (bb) and the inbreeding of their hybrid progeny is shown below. Hence, phenotypic ratio is 3 black: 1 brown i.e. 75% of the progeny would have black coat.

Choose the correct answer from the alternatives given.

In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed. What percentage of the progeny would have black coats?

The correct option is C 75%
The cross between black mouse (BB) and a brown mouse (bb) and the inbreeding of their hybrid progeny is shown below.
Hence, phenotypic ratio is 3 black: 1 brown i.e. 75% of the progeny would have black coat.