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A black body is recessive
to a tan body in the fruit fly Drosophila. |
| Genotype is BB, Phenotype is tan body. |
Genotype is bb, Phenotype is black body. |
| Possible alleles for next generation: B |
Possible alleles for next generation: b |
| The tan fly can only contribute the
B allele to the next generation. The black fly can only contribute
the b allele to the next generation. |
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