JAMB - Biology (1999 - No. 40)
If the offspring of a cross between a brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?
2
3
4
5
Explanation
Cross between bb and BB → Bb Bb Bb Bb
Bb genotype fills the first filal generation
Bb * Bb → BB, Bb, Bb, bb (second filal generatio)
The 3 genotypes (BB, Bb and bb) are formed
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