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Svetlanka [38]
3 years ago
9

In some pedigrees, such as this one, the generations

Biology
1 answer:
Marina CMI [18]3 years ago
7 0
Since the trait is dominant, it is possible for his parents to be heterozygous (Bb). So they have the trait but they have a gene they can pass on with out it. If both of his parents Bb then he could’ve gotten both recessive and therefore not receive the trait
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